电机电控制工程基础期未复试题参考答案
选择题
1 PI校正（ A ）校正
A．滞 B 超前
C滞超前 D超前滞
2 阶系统传递函数时间常数( D )
A．05 B 4
C 2 D 1
3．系统根轨迹（ A ）
A．起始开环极点终开环零点 B 起始闭环极点终闭环零点
C．起始闭环零点终开环极点 D起始开环零点终开环极点
4阶系统传递函数时间常数( C )
A．05 B 4
C 2 D 1
5 二阶系统超调量 ( A )
A 关 B关
C关 C关
6． 劳斯稳定判判断（ A ）稳定性
A．线性定常系统 B 线性时变系统
C 非线性系统 D系统
7．已知原函数终值（ D ）
A．0 B∞
C 075 D05
8 已知线性系统输入x(t)输出y(t)传递函数G(s)正确关系 B
A B
C D
9 设弹簧质量阻尼器机械系统图示外力f(t)输入量位移y(t)输出量运动微分方程式图中系统进行描述微分方程阶次：（ B ）
A 1 B 2 C 3 D 4
10二阶系统传递函数 阻尼振荡频率阻尼（ D ）
A 1 B 2 1 C 2 2 D 1
11表示（ A ）
A 时滞环节 B 振荡环节 C 微分环节 D 惯性环节
12阶系统传递函数 单位阶跃响应（ B ）
A B C D
13某二阶系统特征根两互相等实数系统单位阶跃响应曲线表现（ B ）
A．单调衰减 B 单调升
C 等幅振荡 D振荡衰减
14已知道系统输出拉氏变换 系统处（ C ）
A 欠阻尼 B 阻尼 C 界阻尼 D 阻尼
15 某系统速度误差零该系统开环传递函数（ D ）
A BC D
16根列系统特征方程判断肯定稳定系统（ B ）
A B
C 中均等零正数
17列开环传递函数表示系统属相位系统（ C ）
A B （T>0）
C D
18已知系统频率特性该系统表示（ C ）
A B
C D
20题图中R－C电路幅频特性（ B ）
A B
C D
21已知系统频率特性 该系统表示（ B ）
A B
C D
22已知系统频率特性 输入时系统稳态输出（ D ）
A B
C D
23理想微分环节数幅频特性曲线条斜率（ A ）
A 通ω1点直线 B 通ω1点直线
C 通ω0点直线 D 通ω0点直线
24 系统图示（ C ）装置实现起较简单
A 串联校正 B 联校正
C 混合校正 D 正反馈校正
25二阶系统传递函数 阻尼振荡频率阻尼（ C ）
A 1 B 2 1 C 1 025 D
二判断题
1线性定常系统稳定开环极点位S面左半边 （ — ）
2劳氏稳定判判断线性定常系统稳定性 （ + ）
3Ⅰ型系统开环增益10系统单位斜输入作稳态误差∞（—）
4动态环节传递函数
5二阶系统超调量越系统稳定性越差（ ）
6系统传递函数系统结构外输入关（ ）
7系统稳态误差仅系统结构参数关输入关（ ）
8二阶系统阻尼0866系统阶跃响应定等幅振荡（ +）
9反馈控制系统指正反馈（ ）
10某环节输出量输入量关系y(tKx(t))K 常数称例环节（ +）
11已知系统频率特性 该系统表示 （ ）
12阶微分环节传递函数频率特性表示
（ + ）
13 积分环节数幅频特性条斜率直线 （ + ）
14 系统传递函数输出输入相位差（ ）
15系统幅频特性相频特性取决系统输入初始条件 （ ）
16图中示频率特性积分环节 （ ）
17积分环节幅频特性幅值频率成正关系 （ — ）
18适合应传递函数描述系统线性系统非线性系统（ — ）
19某二阶系统特征根两轭纯虚根该系统单位阶跃响应曲线表现衰减振荡（ — ）
三填空题
1系统输出全部部分返回输入端做 反馈
2系统中开环闭环结合起种系统称 复合控制系统
3输出量直接间接反馈 输入端 形成闭环参控制系统称作 闭环控制系统
4控制务实际 形成控制作规律 否存扰动均 控制象 输出量满足定值求
5系统受扰动偏离原工作状态扰动消失系统动恢复原工作状态
样系统 稳定 系统
6动控制系统元件特性方程式性质分 线性控制系统 非线性控制系统
7实现闭环控制必须 反馈 量进行测量测量结果反馈输入端输入量相减偏差偏差产生直接控制作消 偏差 整控制系统形成闭合回路输出量直接间接反馈 输入 端形成闭环参控制系统称作闭环控制系统
8
题图
图中系统知输入量直接控制器作控制象出现扰动时没干预输出量 输入量期状态工作图中系统 开环 控制系统
9果系统受扰动偏离原工作状态扰动消失系统动恢复原工作状态样系统称 稳定 系统否 稳定 系统反馈控制系统正常工作系统必须 稳定
10函数拉氏变换表达式
11单位阶跃信号时间求导结果 单位脉函数
12单位阶跃函数拉普拉斯变换结果
13单位脉函数拉普拉斯变换 A
14拉氏变换
15原函数初值 0 终值 1
16已知拉氏变换初值 1
17拉氏变换
18 F(s+a)
19L[f(t)] F(s)L[f (tb)]
20描述系统运动程中变量间相互关系数学表达式
21初条件零时 输出量拉氏变换 输入量拉氏变换 称线性系统（元件）传递函数
23数学模型描述系统 输入变量输出变量间关系 数学表达式者说描述系统部变量间关系数学表达式
24果系统数学模型方程 线性 种系统线性系统
25传递函数反映系统身瞬态特性身参数结构 关 输入 关 物理系统 相传递函数传递函数初始条件 关
26 惯性 环节传递函数
27二阶系统标准型式
28I型系统开环增益10系统单位斜坡输入作稳态误差e(∞)
29时间响应 瞬态 响应 稳态 响应两部分组成
30系统 幅频特性 描述系统频率输入信号稳态响应幅值衰减（放）特性系统 相频特性 描述系统频率输入信号稳态响应相位迟超前特性
31频率响应 系统正弦输入信号 响应
32惯性环节传递函数
33输入信号角频率ω某范围改变时系列频率响应称系统 频率响应
34控制系统时间响应划分瞬态稳态两程瞬态程指系统 初始状态
接终状态响应程稳态程指时间t趋 穷 时系统输出状态
35系统输入稳态输出相应该系统频率特性表示
362型系统数幅频特性低频渐线斜率 40 dBdec
37阶系统ω0→∞时矢量D(jω) 时针 方旋转系统稳定否系统稳定
四分析计算综合类型题
1． 设单位反馈系统开环传递函数：G（S） 试求阶跃响应性指标
答案：
系统闭环传递函数：
二阶传递函数标准形式相较知：025
025系统欠阻尼状态：
0484
单位阶跃响应性指标：
445
28s
2． 已知系统开环传递函数：
试：1)．绘出数渐幅频特性曲线相频特性曲线
2)．数频率稳定判判系统闭环稳定性
答案：1)．
（1） 该系统积分放两惯性环节串联构成
（2） K20 20lgK26分贝
（3） 低频积分放环节K26分贝处作 20dB10倍频 线
处作 40dB10倍频 线处作 –60dB10倍频 线
2)．判断稳定性
图知L()>0部分穿越系统闭环稳定
3单位反馈系统开环传递函数：试求输入信号作稳态误差
解：系统Ⅰ型系统
x(t)5 时位置误差系数
x(t) t 时速度误差系数
系统稳态误差：
4设系统传递函数求输入信号正弦信号频率f＝1Hz振幅Xo＝5初相0时系统稳态输出
答案：出G(s)放环节惯性环节串联组成放环节影响输出量幅值惯性环节输出量幅值相位影响
1） 输出量频率输入量频率相
f＝1Hz（rads）
2） 输出量输入量相位差
惯性环节相位（滞）
3） 输出量幅值
4） 稳态输出
5已知单位负反馈系统开环传递函数计算系统阻尼ζ阻尼振荡角频率ωd调节时间ts(5)
答系统闭环传递函数数标准传递函数相较出
ζ025 ωd2 ts(5)6(s)
公式：
1 L[f (ta)]
2 F(t)拉氏变换F（s）
3 放环节传递函数：G（s）K
4 惯性环节传递函数：G（s）K（Ts+1）
4 积分环节传递函数：G（s）Ks
5 振荡环节传递函数：
请您删容O(∩_∩)O谢谢2015年中央电期末复考试抄全电期末考试必备抄电考试必抄请您删容O(∩_∩)O谢谢2015年中央电期末复考试抄全电期末考试必备抄电考试必抄The battle for young viewers CCTV is embracing Internet culture and working with independent producers on TV shows to woo audiences under 35 Han Bing bin reports After charming audiences with his warm smile for 14 years China Central Television host Li Jiaming recently found himself targeted by a group of young netizens unhappy with his style The complaints came after Li hosted the premiere of Rising Star on Oct 31 It is a singing competition show that originated in Israel Many young netizens found his hosting style slow and boring and mocked it as CCTV evening gala style They even initiated an online campaign to replace him The 40yearold host＇s reaction to the criticism was surprising During the second episode he jokingly called himself the slow Jiaming and acted much younger talking faster and louder It＇s like selling a product When the customers file a complaint you must change says Li In the Internet age you get feedback very quickly These young people are so cute When you＇re willing to change for them they will quickly like you back In order to win more young viewers CCTV is relying on programs such as Rising Star to embrace Internet culture In Rising Star a studio audience and fans watching on television vote for their favorite singers in real time using the instantmessaging app WeChat Rising Star was designed to be a live broadcast but the Chinese version isn＇t because of policy reasons Still WeChat votes by viewers at home are still a major factor in determining which contestants advance to the next round In the show＇s latest episode more than 65 million votes were cast via WeChat Now the competition among entertainment shows is very fierce Audiences have more diverse needs CCTV needs to embrace an open attitude interact with young audiences and blend with the Internet says Lyu Yitao director of CCTV＇s entertainment channel The producer of Rising Star Enlight Media says the program will have a phenomenal effect given CCTV＇s audience base nationwide But it comes with a challenge says Zhang Hang chief producer of the program and CEO of Enlight Media＇s TV business Unlike topranking provincial satellite channels such as Hunan TV which have a large base of young fans thanks to a series of phenomenally popular entertainment and reality shows CCTV productions are usually more conservative and serious and thus have a much older audience base If we were to run this program on Hunan we may attract twice as many viewers says Zhang But since we didn＇t make it there we now have to make the best out of the given conditions And it means we have to make certain compromises When the current season of Rising Star ends Zhang says his company will conduct an overall evaluation of the program and make adjustments for future seasons Although audience ratings haven＇t lived up to Zhang＇s expectations he says the program has already helped CCTV attract more young people According to Enlight Media the number of people ages 15 to 35 who watched the first episode of Rising Star was 76 percent higher than the usual audience for CCTV entertainment productions In order to attract young audiences CCTV has been working with independent production companies As one of CCTV＇s closest partners Enlight Media has produced several entertainment and reality shows for the company＇s channels including the Chinese version of The Biggest Loser on CCTV＇s business channel and an original teenager talent show Shaonian Zhongguo－qiang (Strong Young Chinese) on CCTV1 This year CCTV also licensed EEMedia the producer of the popular Super Girl talent shows to produce the talk show Hi 2014 hosted by Taiwan pop star Harlem Yu and one of China＇s most popular TV stars Xie Na The show is geared toward younger audiences Canxing Productions which rose to fame with the success of its Voice of China series on Zhejiang TV also produced two talent shows for CCTV One is an original production called Songs of China which ended up as one of CCTV＇s most watched programs of 2014 The State Administration of Press Publication Radio Film and Television announced earlier this year that starting in 2015 only one music talent show can be aired nationwide during prime time each season and there can be only one program based on foreign formats each year However domestic media report that such policies don＇t apply to CCTV meaning it will become a highly desired platform by production companies Wang Changtian CEO of Enlight Media confirmed to the Shanghai Securities News that its programs scheduled to air on CCTV next year which include at least two reality shows won＇t be affected A kung futhemed reality show produced by Canxing is also reportedly scheduled to run on CCTV next year CCTV is very active The level of its acceptance of new ideas is even beyond my imagination says Zhang Hang Our cooperation with CCTV will surely continue When winter comes nothing is more relaxing than a hot spring bath For thousands of years natural mineralrich hot spring baths have also been used to relieve health ailments The water found in natural hot springs contains a variety of different minerals and the most common one is sulfur It has a rotten egg smell but is excellent for skin The sulfurcontaining water might be just what the doctor ordered when it comes to relieving pain stress itchy skin arthritis and more Hot springs resorts are thriving as biting cold winter arrives Here we take a look at some of the best natural hot springs China has to offer
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选择题
1 PI校正（ A ）校正
A．滞 B 超前
C滞超前 D超前滞
2 阶系统传递函数时间常数( D )
A．05 B 4
C 2 D 1
3．系统根轨迹（ A ）
A．起始开环极点终开环零点 B 起始闭环极点终闭环零点
C．起始闭环零点终开环极点 D起始开环零点终开环极点
4阶系统传递函数时间常数( C )
A．05 B 4
C 2 D 1
5 二阶系统超调量 ( A )
A 关 B关
C关 C关
6． 劳斯稳定判判断（ A ）稳定性
A．线性定常系统 B 线性时变系统
C 非线性系统 D系统
7．已知原函数终值（ D ）
A．0 B∞
C 075 D05
8 已知线性系统输入x(t)输出y(t)传递函数G(s)正确关系 B
A B
C D
9 设弹簧质量阻尼器机械系统图示外力f(t)输入量位移y(t)输出量运动微分方程式图中系统进行描述微分方程阶次：（ B ）
A 1 B 2 C 3 D 4
10二阶系统传递函数 阻尼振荡频率阻尼（ D ）
A 1 B 2 1 C 2 2 D 1
11表示（ A ）
A 时滞环节 B 振荡环节 C 微分环节 D 惯性环节
12阶系统传递函数 单位阶跃响应（ B ）
A B C D
13某二阶系统特征根两互相等实数系统单位阶跃响应曲线表现（ B ）
A．单调衰减 B 单调升
C 等幅振荡 D振荡衰减
14已知道系统输出拉氏变换 系统处（ C ）
A 欠阻尼 B 阻尼 C 界阻尼 D 阻尼
15 某系统速度误差零该系统开环传递函数（ D ）
A BC D
16根列系统特征方程判断肯定稳定系统（ B ）
A B
C 中均等零正数
17列开环传递函数表示系统属相位系统（ C ）
A B （T>0）
C D
18已知系统频率特性该系统表示（ C ）
A B
C D
20题图中R－C电路幅频特性（ B ）
A B
C D
21已知系统频率特性 该系统表示（ B ）
A B
C D
22已知系统频率特性 输入时系统稳态输出（ D ）
A B
C D
23理想微分环节数幅频特性曲线条斜率（ A ）
A 通ω1点直线 B 通ω1点直线
C 通ω0点直线 D 通ω0点直线
24 系统图示（ C ）装置实现起较简单
A 串联校正 B 联校正
C 混合校正 D 正反馈校正
25二阶系统传递函数 阻尼振荡频率阻尼（ C ）
A 1 B 2 1 C 1 025 D
二判断题
1线性定常系统稳定开环极点位S面左半边 （ — ）
2劳氏稳定判判断线性定常系统稳定性 （ + ）
3Ⅰ型系统开环增益10系统单位斜输入作稳态误差∞（—）
4动态环节传递函数
5二阶系统超调量越系统稳定性越差（ ）
6系统传递函数系统结构外输入关（ ）
7系统稳态误差仅系统结构参数关输入关（ ）
8二阶系统阻尼0866系统阶跃响应定等幅振荡（ +）
9反馈控制系统指正反馈（ ）
10某环节输出量输入量关系y(tKx(t))K 常数称例环节（ +）
11已知系统频率特性 该系统表示 （ ）
12阶微分环节传递函数频率特性表示
（ + ）
13 积分环节数幅频特性条斜率直线 （ + ）
14 系统传递函数输出输入相位差（ ）
15系统幅频特性相频特性取决系统输入初始条件 （ ）
16图中示频率特性积分环节 （ ）
17积分环节幅频特性幅值频率成正关系 （ — ）
18适合应传递函数描述系统线性系统非线性系统（ — ）
19某二阶系统特征根两轭纯虚根该系统单位阶跃响应曲线表现衰减振荡（ — ）
三填空题
1系统输出全部部分返回输入端做 反馈
2系统中开环闭环结合起种系统称 复合控制系统
3输出量直接间接反馈 输入端 形成闭环参控制系统称作 闭环控制系统
4控制务实际 形成控制作规律 否存扰动均 控制象 输出量满足定值求
5系统受扰动偏离原工作状态扰动消失系统动恢复原工作状态
样系统 稳定 系统
6动控制系统元件特性方程式性质分 线性控制系统 非线性控制系统
7实现闭环控制必须 反馈 量进行测量测量结果反馈输入端输入量相减偏差偏差产生直接控制作消 偏差 整控制系统形成闭合回路输出量直接间接反馈 输入 端形成闭环参控制系统称作闭环控制系统
8
题图
图中系统知输入量直接控制器作控制象出现扰动时没干预输出量 输入量期状态工作图中系统 开环 控制系统
9果系统受扰动偏离原工作状态扰动消失系统动恢复原工作状态样系统称 稳定 系统否 稳定 系统反馈控制系统正常工作系统必须 稳定
10函数拉氏变换表达式
11单位阶跃信号时间求导结果 单位脉函数
12单位阶跃函数拉普拉斯变换结果
13单位脉函数拉普拉斯变换 A
14拉氏变换
15原函数初值 0 终值 1
16已知拉氏变换初值 1
17拉氏变换
18 F(s+a)
19L[f(t)] F(s)L[f (tb)]
20描述系统运动程中变量间相互关系数学表达式
21初条件零时 输出量拉氏变换 输入量拉氏变换 称线性系统（元件）传递函数
23数学模型描述系统 输入变量输出变量间关系 数学表达式者说描述系统部变量间关系数学表达式
24果系统数学模型方程 线性 种系统线性系统
25传递函数反映系统身瞬态特性身参数结构 关 输入 关 物理系统 相传递函数传递函数初始条件 关
26 惯性 环节传递函数
27二阶系统标准型式
28I型系统开环增益10系统单位斜坡输入作稳态误差e(∞)
29时间响应 瞬态 响应 稳态 响应两部分组成
30系统 幅频特性 描述系统频率输入信号稳态响应幅值衰减（放）特性系统 相频特性 描述系统频率输入信号稳态响应相位迟超前特性
31频率响应 系统正弦输入信号 响应
32惯性环节传递函数
33输入信号角频率ω某范围改变时系列频率响应称系统 频率响应
34控制系统时间响应划分瞬态稳态两程瞬态程指系统 初始状态
接终状态响应程稳态程指时间t趋 穷 时系统输出状态
35系统输入稳态输出相应该系统频率特性表示
362型系统数幅频特性低频渐线斜率 40 dBdec
37阶系统ω0→∞时矢量D(jω) 时针 方旋转系统稳定否系统稳定
四分析计算综合类型题
1． 设单位反馈系统开环传递函数：G（S） 试求阶跃响应性指标
答案：
系统闭环传递函数：
二阶传递函数标准形式相较知：025
025系统欠阻尼状态：
0484
单位阶跃响应性指标：
445
28s
2． 已知系统开环传递函数：
试：1)．绘出数渐幅频特性曲线相频特性曲线
2)．数频率稳定判判系统闭环稳定性
答案：1)．
（1） 该系统积分放两惯性环节串联构成
（2） K20 20lgK26分贝
（3） 低频积分放环节K26分贝处作 20dB10倍频 线
处作 40dB10倍频 线处作 –60dB10倍频 线
2)．判断稳定性
图知L()>0部分穿越系统闭环稳定
3单位反馈系统开环传递函数：试求输入信号作稳态误差
解：系统Ⅰ型系统
x(t)5 时位置误差系数
x(t) t 时速度误差系数
系统稳态误差：
4设系统传递函数求输入信号正弦信号频率f＝1Hz振幅Xo＝5初相0时系统稳态输出
答案：出G(s)放环节惯性环节串联组成放环节影响输出量幅值惯性环节输出量幅值相位影响
1） 输出量频率输入量频率相
f＝1Hz（rads）
2） 输出量输入量相位差
惯性环节相位（滞）
3） 输出量幅值
4） 稳态输出
5已知单位负反馈系统开环传递函数计算系统阻尼ζ阻尼振荡角频率ωd调节时间ts(5)
答系统闭环传递函数数标准传递函数相较出
ζ025 ωd2 ts(5)6(s)
公式：
1 L[f (ta)]
2 F(t)拉氏变换F（s）
3 放环节传递函数：G（s）K
4 惯性环节传递函数：G（s）K（Ts+1）
4 积分环节传递函数：G（s）Ks
5 振荡环节传递函数：
请您删容O(∩_∩)O谢谢2015年中央电期末复考试抄全电期末考试必备抄电考试必抄请您删容O(∩_∩)O谢谢2015年中央电期末复考试抄全电期末考试必备抄电考试必抄The battle for young viewers CCTV is embracing Internet culture and working with independent producers on TV shows to woo audiences under 35 Han Bing bin reports After charming audiences with his warm smile for 14 years China Central Television host Li Jiaming recently found himself targeted by a group of young netizens unhappy with his style The complaints came after Li hosted the premiere of Rising Star on Oct 31 It is a singing competition show that originated in Israel Many young netizens found his hosting style slow and boring and mocked it as CCTV evening gala style They even initiated an online campaign to replace him The 40yearold host＇s reaction to the criticism was surprising During the second episode he jokingly called himself the slow Jiaming and acted much younger talking faster and louder It＇s like selling a product When the customers file a complaint you must change says Li In the Internet age you get feedback very quickly These young people are so cute When you＇re willing to change for them they will quickly like you back In order to win more young viewers CCTV is relying on programs such as Rising Star to embrace Internet culture In Rising Star a studio audience and fans watching on television vote for their favorite singers in real time using the instantmessaging app WeChat Rising Star was designed to be a live broadcast but the Chinese version isn＇t because of policy reasons Still WeChat votes by viewers at home are still a major factor in determining which contestants advance to the next round In the show＇s latest episode more than 65 million votes were cast via WeChat Now the competition among entertainment shows is very fierce Audiences have more diverse needs CCTV needs to embrace an open attitude interact with young audiences and blend with the Internet says Lyu Yitao director of CCTV＇s entertainment channel The producer of Rising Star Enlight Media says the program will have a phenomenal effect given CCTV＇s audience base nationwide But it comes with a challenge says Zhang Hang chief producer of the program and CEO of Enlight Media＇s TV business Unlike topranking provincial satellite channels such as Hunan TV which have a large base of young fans thanks to a series of phenomenally popular entertainment and reality shows CCTV productions are usually more conservative and serious and thus have a much older audience base If we were to run this program on Hunan we may attract twice as many viewers says Zhang But since we didn＇t make it there we now have to make the best out of the given conditions And it means we have to make certain compromises When the current season of Rising Star ends Zhang says his company will conduct an overall evaluation of the program and make adjustments for future seasons Although audience ratings haven＇t lived up to Zhang＇s expectations he says the program has already helped CCTV attract more young people According to Enlight Media the number of people ages 15 to 35 who watched the first episode of Rising Star was 76 percent higher than the usual audience for CCTV entertainment productions In order to attract young audiences CCTV has been working with independent production companies As one of CCTV＇s closest partners Enlight Media has produced several entertainment and reality shows for the company＇s channels including the Chinese version of The Biggest Loser on CCTV＇s business channel and an original teenager talent show Shaonian Zhongguo－qiang (Strong Young Chinese) on CCTV1 This year CCTV also licensed EEMedia the producer of the popular Super Girl talent shows to produce the talk show Hi 2014 hosted by Taiwan pop star Harlem Yu and one of China＇s most popular TV stars Xie Na The show is geared toward younger audiences Canxing Productions which rose to fame with the success of its Voice of China series on Zhejiang TV also produced two talent shows for CCTV One is an original production called Songs of China which ended up as one of CCTV＇s most watched programs of 2014 The State Administration of Press Publication Radio Film and Television announced earlier this year that starting in 2015 only one music talent show can be aired nationwide during prime time each season and there can be only one program based on foreign formats each year However domestic media report that such policies don＇t apply to CCTV meaning it will become a highly desired platform by production companies Wang Changtian CEO of Enlight Media confirmed to the Shanghai Securities News that its programs scheduled to air on CCTV next year which include at least two reality shows won＇t be affected A kung futhemed reality show produced by Canxing is also reportedly scheduled to run on CCTV next year CCTV is very active The level of its acceptance of new ideas is even beyond my imagination says Zhang Hang Our cooperation with CCTV will surely continue When winter comes nothing is more relaxing than a hot spring bath For thousands of years natural mineralrich hot spring baths have also been used to relieve health ailments The water found in natural hot springs contains a variety of different minerals and the most common one is sulfur It has a rotten egg smell but is excellent for skin The sulfurcontaining water might be just what the doctor ordered when it comes to relieving pain stress itchy skin arthritis and more Hot springs resorts are thriving as biting cold winter arrives Here we take a look at some of the best natural hot springs China has to offer
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