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【单选题】
向碘化银正溶胶中滴加过量的KI溶液，生成的新溶胶在外加直流电场中的移动( )。A.
向正极移动
B.
向负极移动
C.
不移动
D.
无法确定
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【单选题】---There must be a dozen pens in this house but I can never find one when I need one. --- Keep looking. ____ is sure to turn up.
A.
one
B.
it
C.
that
D.
that
【简答题】——There must be a dozen pens in this house but I can never find one when I need one. ——Keep looking. ____ is sure to turn up.
【简答题】液压控制阀按其用途不同分为() A压力控制阀 B流量控制阀 C溢流阀 D方向控制阀
【简答题】溢流阀为 压力控制，阀口常 ，先导阀弹簧腔的泄漏油与阀的出口相通。定值减压阀为 压力控制，阀口常 ，先导阀弹簧腔的泄漏油必须 。（进口；闭；出口；开；单独引回油箱）
【单选题】Need Volunteers! I need to find a student to take a few psychological tests. I am a professor in psychology. I am only doing this for educational (141). You get $30 and it should be an interesting exp...
A.
deposit
B.
purposes
C.
objective
D.
aspiration
【单选题】听力原文：W: I can’t find the key to my car I need it for a drive. M: Shall we find it later? Right now I want you to help fix the shelf before I paint it. Q: What would they do first? (13)
A.
Look for the key.
B.
Paint a shelf.
C.
Repair the car.
D.
Fix a shelf.
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