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【单选题】
PECVD的一个基本特征是实现了薄膜沉积工艺的 低温化(<450°C)A.
<350℃
B.
<450℃
C.
<550℃
D.
<650℃
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反馈参考答案：
举一反三
【简答题】()指引人生方向,信念决定事业成败。
【单选题】听力原文：M: Jane, have you got time this evening? W: Not really, I'm afraid. But I'll be free tomorrow. M: Well, I'll be busy then. Maybe another time, I'll ring up to see if you are not engaged in anythi...
A.
They will meet later.
B.
They will not be able to see each other.
C.
The woman has got something to do.
【单选题】－Why have you decided on the countryside for your holiday? －Because we are there is lots of clear, fresh air there.
A.
so many
B.
much
C.
many
D.
several
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