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【单选题】
某液压系统中要求选用三位四通换向阀中位时可形成差动回路,用 ( )型。A.
O 型
B.
Y 型
C.
P 型
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【单选题】It’s very easy for young people to get ______ computer games.
A.
addict
B.
addicted
C.
addicted to
D.
addicting to
【单选题】It’s easy for young people to get ______computer games.
A.
addit
B.
addicted
C.
addicted to
D.
addicting to
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