问题
单项选择题
闭环调速系统的静特性是表示闭环系统电动机的（）。
A、电压与电流（或转矩）的动态关系
B、转速与电流（或转矩）的动态关系
C、转速与电流（或转矩）的静态关系
D、电压与电流（或转矩）的静态关系
答案
参考答案：C
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闭环调速系统的静特性是表示闭环系统电动机的（）。
A、电压与电流（或转矩）的动态关系
B、转速与电流（或转矩）的动态关系
C、转速与电流（或转矩）的静态关系
D、电压与电流（或转矩）的静态关系
参考答案：C
People in different countries have different ways of doing things. Something is 1 in one country, but it may be quite impolite in another. In Britain, you mustn`t lift your bowl to your 2 when you are having some liquid(液体)food. But it’s 3 in China. And in Japan you even needn`t worry about making 4 while you are having it . It shows that you`re enjoying it . But people in Britain think it is bad manners . If you are a visitor in Mongolia ,what manners do they wish 5 to have ? They wish you to have a loud“burp”( 打嗝) 6 you finish eating .Burping shows that you like the food . In Britain , you should try not to 7 your hands on the table when you’re having a meal .But in Arab (阿拉伯)countries you must be very careful with your hands . You 8 eat with your left hand .Arabs consider (认为)it very 9 manners eating with left hands .So when you are in other countries , 10 carefully and follow them .As a saying goes , “Do as the Romans do .”
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