—She was late for the party.—That's () she

题型:单项选择题

问题:

—She was late for the party.

—That's () she had forgotten the exact time.

A. why

B. how

C. because

D. whether

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题型:单项选择题

交流双速电梯起动过程中在定子电路中串入电抗器是为了()

A.改善运行效率

B.限制起动电流

C.改善舒适感

D.减少起动时间

E.加大起动电流

题型:单项选择题

以下实验能说明分子在化学反应中是可分的是(  )

A.

B.

C.

D.

题型:单项选择题

The conference will be put off until next week, _______ we will have made all the preparations.

A.which

B.in which

C.when

D.on which

题型:单项选择题

冷球蛋白出现沉淀一般在()

A.2~4小时

B.6~8小时

C.8~12小时

D.16~20小时

E.24~72小时

题型:单项选择题

当潮湿的气团前进时,遇到高山阻挡,气流被迫缓慢上升,引起绝热降温,发生凝结,这样形成的降雨,称为( )。

A.对流雨
B.气旋雨
C.地形雨
D.台风雨

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