题目内容

I can speak French, but only().

A. little
B. few
C. a little
D. a few

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促进静脉血液回流最重要的因素是（）。

A. 重力作用
B. 心脏收缩能力
C. 骨骼肌收缩
D. 呼吸运动

计算患病率的分子是

A. 观察期间某病的新发病例数
B. 观察期间某病的现患病例数
C. 观察期间之前某病的患病人数
D. 观察期问某病的暴露人口
E. 以上均不是

Mary had taken pains to ()that her guests had everything they could possibly want.

A. see
B. know
C. feel
D. learn

It suddenly ______ to me that somebody might be able to lend us the money.

A. came
B. turned
C. referred
D. occurred