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【单选题】
关于润滑系统的集滤器,说法正确的是( )A.
浮筒式集滤器固定安装在油底壳内
B.
集滤器安装在机油泵之前
C.
采用集滤器是为了避免吸入泡沫
D.
集滤器能有效确保燃油的清洁
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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.
A.
did
B.
do
C.
had done
D.
have been doing
【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
【单选题】In order to find the missing boy, the young couple all they can over the past twenty-four hours.
A.
do
B.
did
C.
have been doing
D.
had done
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