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【简答题】
潜钻机通过其风接头,将()输入冲击器,依靠机械传动装置,可确保空心主轴输出的( )传递给钎杆。
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【简答题】Everyone 1 tired sometimes. When you are tired, You should follow the doctor’s advice. First, you should go to bed early 2 a few nights. You shouldn’t 3 at night or study 4 . Having a good rest 5 good...
【单选题】— Are you OK? You look tired. — No, I am not tired but scared. Just now I saw a mouse ________ in front of me. [ ]
A.
running
B.
run
C.
ran
D.
to run
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