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【判断题】
开环系统对于负载变化引起的转速变化不能自我调节，但对其它外界扰动是能自我调节的。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】Where does this conversation probably take place?
A.
In a department.
B.
In a restaurant.
C.
In a factory.
【简答题】叶绿素是叶绿酸与甲醇与____的二酯化合物。
【单选题】When is this conversation likely taking place?
A.
In the morning.
B.
In the afternoon.
C.
In the evening.
D.
Late at night.
【单选题】This conversation could NOT happen in which of the following places?
A.
In the drugstore
B.
In the hospital
C.
In the Emergency Room
D.
At the dentist's
【单选题】Where does this conversation most probably take place?
A.
In a school.
B.
In a restaurant.
C.
In a coffee house.
【单选题】What does this conversation most probably take place?
A.
In Britain.
B.
In Australia.
C.
In Italy.
D.
None of the above.
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