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【判断题】
上颌中切牙的唇面形态与牙弓形及面形是协调一致的A.
正确
B.
错误
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【简答题】The person behind you constantly kicks the back of your seat．Your talkative seatmate doesn’t understand your need for sleep．And the aircraft’s bathroom is a total mess．These situations can make even a...
【简答题】报警阀的作用是什么?目前在自动喷水灭火系统中常用的报警阀主要有哪几种类型?
【单选题】Little _______ what you said. I wish you repeated it.
A.
I understand
B.
did I understand
C.
I did understand
D.
have I understood
【单选题】Would you mind _____ it again? Try to make yourself ______. [ ]
A.
say, understood
B.
to say, understand
C.
saying, understand
D.
saying, understood
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