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【单选题】
为了使垂直工作机构液压缸停止运动时，能在任意位置停留而不发生位移，应采用（ ）。A.
调压回路
B.
平衡回路
C.
换向回路
D.
保压回路
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举一反三
【单选题】How do you deal with the disagreement between the company and the Customers? The key __the problem is to meet the demand___by the customers.
A.
to solving;making
B.
to solving;make
C.
to solve;making
D.
to solve;made
【单选题】--How do you deal with the disagreement between the company and the customer? --The key ____ the problem is to meet the demand made by the customer.
A.
of solving
B.
of solve
C.
to solving
D.
to solve
【简答题】Read the following problem and answer the question with key words and expressions. You are on the train and you are very tired. You want to get some sleep, but there is a child screaming all the time...
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