皮皮学，免费搜题
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搜题
【单选题】
如图为 555 定时器组成的多谐振荡器,电容 C 充电时间公式是多少A.
电容充电时间：
B.
电容充电时间：
C.
电容充电时间：
D.
电容充电时间：
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举一反三
【单选题】Part programmers must be familiar with the functions of numerically controlled machine tools and machining ________ .
A.
processes
B.
tools
C.
paths
D.
trends
【单选题】听听力，回答题：
A.
Part of the dried, mushrooms have begun to decay．
B.
The dried mushrooms didnt arrive on time．
C.
Part of the dried mushrooms werent inspected．
D.
The dried mushrooms are lost during the shipment．
【单选题】If ten different part programmers were asked to develop a process plan for the same part, they would probably come up with ten different ________.
A.
CAM
B.
CAD
C.
CAP
D.
CAE
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