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【单选题】
对接焊缝采用（），焊后产生变形最小。A.
V形坡口
B.
X形坡口
C.
U形坡口
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举一反三
【单选题】____Are you pleased with the performance?－－－－－ Not at all. It couldn’t have been_____A．worseB．so
A.
15. ____Are you pleased with the performance? ----- Not at all. It couldn’t have been_____ A．worse
B.
so better
C.
better
D.
the worst
【多选题】When it is inconvenient for the room attendant to make up the room, the room attendant may say the __________.
A.
When is a good time to come back?
B.
I have to clean the room now.
C.
I will be back in half an hour later.
D.
What time would be convenient?
【单选题】—Will you go to the party tomorrow， Xiao Hai？ —No, ____ I was invited to.A．as long asB．so far asC
A.
15.—Will you go to the party tomorrow， Xiao Hai？ —No, ____ I was invited to. A．as long as
B.
so far as
C.
as if
D.
even if
【单选题】Can I help you? .
A.
Yes, I can.
B.
Yes, please.
C.
No, you are not.
D.
No, you will not.
【单选题】－－－ Who are the teenagers gathering at the school gate? －－－ Well, if you _____ know, they are al
A.
15. --- Who are the teenagers gathering at the school gate? --- Well, if you _____ know, they are all my visiting students. A．need
B.
must
C.
may
D.
Will
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