Bacteria are sometimes ______ too small to be seen without a microphone.
A. far
B. rather
C. quite
D. very
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The new washing machines are __ at the rate of fifty a day.
A. turned up
B. tnmed down
C. turned out
D. turned in
I have never been to France, but that is the country ______
A. where I like to visit most
B. I'd most like to visit
C. which I like to visit mostly
D. where I'd like most to visit
肾上腺皮质激素诱发和加重感染的主要原因是
A. 抑制炎症反应和免疫反应，降低机体的防御功能
B. 抑制ACTH的释放
C. 病人对激素不敏感而未反应出相应的疗效
D. 促使许多病原微生物繁殖所致
E. 用量不足，无法控制症状而造成
A man escaped from the prison last night. It was a long time ______ the guards discovered what had happened.
A. before
B. until
C. since
D. when
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