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【简答题】
元件是用来检测被控制的物理量的元件。 元件是用来直接推动被控对象，使被控量发生变化的元件。
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举一反三
【单选题】What does the author say about the cause（s） of cheating? 查看材料
A.
Family， culture and society play an active part.
B.
Bad school environment is the leading cause of student cheating.
C.
Parents are always to blame for their children's cheating behaviour.
D.
Cheating exists primarily because students learn bad things from TV.
【单选题】What's the major cause in the decline of Asian elephants?
A.
Their taming for circuses and zoos.
B.
The destruction of their natural homes.
C.
Man's lack of knowledge about their behavior.
D.
The greater vulnerability to extinction than other species.
【单选题】What's the major cause in the decline of Asian elephants?
A.
The taming for circuses and zoos.
B.
The destruction of their natural homes.
C.
Man's lack of knowledge about their behavior.
D.
The greater vulnerability to extinction than other species.
【单选题】在存储系统应用，LUN拷贝不包括以下哪种应用场景（）
A.
将数据从本存储系统复制到一个或多个其他存储系统
B.
只能在同类型的存储系统间进行数据复制
C.
将数据从一个或多个LUN其他存储系统复制到本存储系统
D.
将数据从本存储系统中的一个LUN复制到另一个LUN
【单选题】What was the cause of the patient's disease?
A.
Headache.
B.
Stomach trouble.
C.
Disturbance of conscience.
D.
Some unknown physical weakness
【单选题】在存储系统应用,LUN拷贝不包括以下哪种应用场景()
A.
将数据从本存储系统复制到一个或多个其他系统
B.
只能在同类型的存储系统间进行数据复制
C.
将数据从一个或过个LUN其他存储系统复制到本存储系统
D.
将数据从本存储系统中的一个LUN复制到另一个LUN
【单选题】What is a cause for the change of Stefania’s body clock?
A.
Eating fewer hours of sleep.
B.
Having more hours of sleep
C.
Lacking physical exercise.
D.
Getting no natural light.
【单选题】What was the cause of the patient's disease?
A.
Headaches.
B.
Stomach trouble.
C.
Disturbance of conscience.
D.
Some unknown physical weakness.
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