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【单选题】
用于计算缓和曲线最小长度的司机操作反应时间一般取为 ( )A.
1 秒
B.
3 秒
C.
6 秒
D.
9 秒
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皮皮学刷刷变学霸
举一反三
【单选题】When the teacher came in, Jack _____ with his classmates. [ ]
A.
talking
B.
was talking
C.
talked
D.
talks
【单选题】The students __________ loudly when the teacher came in. [ ]
A.
talked
B.
talking
C.
were talking
D.
to talk
【判断题】一个力F作用在质量为 1.0 kg的质点上,使之沿x轴运动.已知在此力作用下质点的运动学方程为 (SI).在0到4 s的时间间隔内,力F的冲量大小10 N·s.
A.
正确
B.
错误
【简答题】Decide whether the following statements are true (T) or false (F) according to the text. 根据课文判断下列陈述是否正确 1. Paul’s first chemistry teacher is a tall handsome man. ( ) 2. The teacher made the mixtur...
【单选题】When the teacher came in, all of us _______.
A.
stopped talking
B.
stopped to talk
C.
stop talking
D.
stop to talk
【简答题】I. Decide whether the following statements are true (T) or false (F) according to the text. 根据课文判断下列陈述是否正确。 1. Paul’s first chemistry teacher is a tall handsome man. ( ) 2. The teacher made the mi...
【简答题】短文改错。 When I walked into the classroom, the teacher was handing in the tests. I was feeling very nervous. I had not studied at all at the weekend as I had thought it would be easy test. I went through...
【单选题】一个力F作用在质量为1.0kg的质点上，使之沿x轴运动，已知在此力作用下质点的运动方程为【图片】，在0到4s的时间间隔内：力F的冲量大小I= N.s
A.
16
B.
24
C.
40
D.
12
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