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【单选题】
An elevator is moving upward with constant acceleration. The dashed curve shows the position y of the ceiling of the elevator as a function of the time t . At the instant indicated by the dot, a bolt breaks loose and drops from the ceiling. Which curve best represents the position of the bolt as a function of time?
A.
B.
C.
D.
E.
E
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参考答案:
举一反三
【简答题】发放一次紧急贷款,需要还款的本息和为____
【单选题】私の趣味は 切手を 集める( )です。
A.
B.
もの
C.
ということ
D.
こと
【单选题】私の趣味は映画を見る です。
A.
B.
C.
こと
D.
もの
【判断题】私の趣味は音楽です。
A.
正确
B.
错误
【单选题】同心同径的圆弧标注尺寸时, 标注为
A.
R
B.
2×R
C.
Ф
【单选题】下列关于尺寸标注的说法,不正确的有( )
A.
规格或尺寸相同的构件可只标注一个
B.
全船性图样的肋位编号按偶数标注
C.
曲线定形尺寸可以直接标在图中
D.
当圆弧半径过大或在图形范围内无法标出圆心位置时,半径线用折线表示
【单选题】在纯电容电路中,已知电流的初相角为300,则电压的初相角为( )度。
A.
-60
B.
30
C.
60
D.
90
【单选题】Who may perform as a lookout?
A.
A member of the engineering watch.
B.
A member of the navigational watch.
C.
A member of the Stewards Department.
D.
All of the above.
【简答题】发放一次20万紧急贷款,需要还款的本息和为____
【单选题】Who may perform as a lookout?
A.
A member of the engineering watch
B.
A member of the navigational watch
C.
A member of the Stewards Department
D.
A member of the Catering Department
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