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【單選題】
物體的位移隨時間變化的函數關系是X=4t+3t2(m), 則它運動的初速度和加速度分別是
A.
0、3m/s2
B.
4m/s、3m/s2
C.
4m/s、9m/s2
D.
4m/s、6m/s2
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舉報參考答案：
舉一反三
【單選題】I can’t understand why he had me _________ for two hours in the rain.
A.
waiting
B.
wait
C.
waited
D.
to wait
【單選題】She _________ down her book and ________ in bed.
A.
lay; laid
B.
laid; lay
C.
lay; lay
D.
laid; laid
相關題目：
【單選題】I can’t understand why he had me _________ for two hours in the rain.
A.
waiting
B.
wait
C.
waited
D.
to wait
【單選題】She _________ down her book and ________ in bed.
A.
lay; laid
B.
laid; lay
C.
lay; lay
D.
laid; laid
參考解析：
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