取力器挂档要求气压是()MPa。
A.0.1~0.4
B.0.4~0.8
C.0.8~0.9
D.1.0~1.2
参考答案:B
This is the factory in ______ my father works. [ ]
A. that
B. where
C. which
D. who
中国石油对外依存度已超过(),天然气对外依存度超过()。
A.60%、30%
B.70%、40%
C.60%、40%
D.70%、30%