David and Sheila are unable to have children, but they’re hoping to __________ a little boy
A. cultivate
B. raise
C. adopt
D. acquire
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由负载带动电动机，使电动机处于异步发电机的状态，称为()状态。
A. 电动机
B. 再生制动
C. 反接制动
D. 单相制动
As you know, when college students __________ their future employment, they often think of
A. apply
B. demand
C. anticipate
D. suppose
门座式起重机的驱动装置不包括()。
A. 车轮
B. 电动机
C. 制动器
D. 减速器
型号为TQ60/80的塔吊的配重臂的臂长()米。
A. 6
B. 8
C. 10
D. 12
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