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【单选题】
为什么工艺要求在进行焊接前,要先对PCB进行预热?A.
加快锡的温度
B.
使焊点美观
C.
防止焊点虚焊
D.
除湿
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反馈参考答案：
举一反三
【单选题】Mary ______ her shoulders when I asked her what we should do.
A.
tapped
B.
shrugged
C.
threw
D.
shook
【简答题】在铁碳相图中,ECF线是共晶线,其温度为____。
【单选题】Mary is currently buying apples and oranges such that the last unit of apples has 30 units of utility and the last unit of oranges has 40 units of utility. She has allocated her entire budget. If the ...
A.
buy more apples and fewer oranges
B.
buy fewer apples and fewer oranges
C.
buy more oranges and fewer apples
D.
continue to buy the same amounts of both goods
E.
None of the above answers is correct.
【单选题】Thai is the only way we can imagine _________the overuse of water in students' bathrooms.
A.
reducing
B.
to reduce
C.
reduced
D.
reduce
【多选题】What should Mary do before and during the interview?
A.
Dress properly
B.
Be punctual
C.
Express thanks to the interviewer
D.
Use strong perfume
E.
Close the door after you
F.
Express herself clearly
G.
Forget important things
【简答题】如何编制项目成本预算?
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