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【单选题】
两个圆锥相交,空间形状为两条直线,则它们的位置是( )。A.
共顶
B.
轴线平行
C.
轴线垂直
D.
轴线相交
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举一反三
【单选题】If we had enough time to prepare, the result______ much better.
A.
would be
B.
would have been
C.
had been
D.
were
【单选题】If we __________enough rain last year, we___________a good harvest this year. [ ]
A.
had had; would have gained
B.
had had; would gain
C.
had ; would have gained
D.
had ; would gain
【单选题】We didn't have enough chairs, ______ some of the students had to sit on the floor. [ ]
A.
but
B.
so
C.
or
D.
and
【单选题】If we'd had enough time and resources, I'm sure we could have done the work ________.
A.
start-up
B.
in-house
C.
off-line
【单选题】听力原文：W: Have you had the brakes and tires checked? And do you have enough money? M: I'm taking care of everything, and I'm sure it's going to be a wonderful trip. Q: What's the woman going to do? (16)
A.
Buy some traveler's checks.
B.
Borrow some money from a friend.
C.
Check the brakes and tires.
D.
Spend some time traveling.
【单选题】We had to ______ our visit to the Bird Nest because we didn’t have enough time to see them before we left Beijing.
A.
prohibit
B.
postpone
C.
promote
D.
deposit
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