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【单选题】
Since we can hardly conquer nature, it would be wise to stay ______ it.
A.
in harmony with
B.
out of  harmony with
C.
in harmony
D.
in disharmony with
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举一反三
【简答题】Match each word with its meaning.
【简答题】方向控制阀用于控制液压系统中液流的__________。
【简答题】Bellboy
【简答题】Match each word with its definition
【简答题】Match each word with the right meaning
【简答题】Match each word with its meaning.
【判断题】方向控制阀用于控制液压系统中液流的方向和通断。( )
A.
正确
B.
错误
【简答题】Match each word with their Chinese meaning
【单选题】bellboy
A.
门童
B.
经理
C.
行李生
【简答题】方向控制阀用于控制液压系统中液流的________和________。