Mr. Smith is not doing well; the doctor told us that several colds ________ his health.
A. had undermined
B. undermine
C. undermined
D. have undermined
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The best way to deal with problems at home is to talk things out calmly and honestly and try to reach a__________.
A. comprise
B. compress
C. composite
D. compromise
Darwin's theory of evolution remains ________partly because it challenges the religious belief that God created man.
A. conventional
B. controversial
C. controvert
D. convertible
It was reported the president had ________ to fight if war was necessary, even if it meant destroying his chances of re-election.
A. resolve
B. solve
C. resolved
D. solved
按压紧弹簧的形式及布置形式不同,离合器分为、、和。