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【多选题】
通常所称的焊条直径均是指焊芯的直径，常用的焊条直径为( )及4 mm、 5 mm、6 mm等。A.
1.6 mm
B.
2 mm
C.
3 mm
D.
3.2 mm
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举一反三
【单选题】In order to find the missing child，villagers ________ all they can over the past five hours.(2012·安徽)
A.
did
B.
do
C.
had done
D.
have been doing
【多选题】Which of the following aspects need to be given in order to find the lost luggage?
A.
your flight number
B.
your age
C.
description about your luggage
D.
your contact number or address
【多选题】Which of the following aspects need to be given in order to find the lost luggage?
A.
your age
B.
your flight number
C.
description about your luggage
D.
your contact number or address
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