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【判断题】
我国一般要求越野车的最大爬坡度不小于 30% 。A.
正确
B.
错误
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举一反三
【单选题】__________at the gate of the theater, Susan found the ticket for the play was left at home.
A.
To arrive
B.
On arriving
C.
As arriving
D.
While arrived
【单选题】听力原文：I heard from Mary that last semester, Susan found it difficult to stay On good terms with her roommate Jenny. The relationship between Susan and Jenny is______.
A.
neutral.
B.
friendly.
C.
unclear.
D.
strained.
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