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【判断题】
直喷发动机控制系统中，为了解决氮氧化合物的排放，一般采用EGR装置。A.
正确
B.
错误
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举一反三
【单选题】Never eat food that stays overnight, _____ it tastes _____. [ ]
A.
if; good
B.
but; well
C.
even though; good
D.
even if; well
【单选题】Sally, a shy girl, never speaks in public _______ she is asked to, never!
A.
until
B.
unless
C.
even though
D.
as though
【简答题】My teachers suggested that I see a speech specialist (专家) in school. I never really gave much thought to my speech. If other people understood what I was saying, then that was good enough. I didn’t mi...
【简答题】先化简,后求值: ,其中a=-2.(把书写的过程写在纸上,并拍照在答案处上传照片)
【单选题】_____he studies hard, he will never pass the examination.
A.
If
B.
Unless
C.
Even if
D.
Even though
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