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印度大吉岭红茶发酵程度较轻,干茶色泽乌褐带绿,香气鲜浓持久,带有麝香葡萄香气。
A.错误
B.正确
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一般参数的闭式软齿面齿轮传动的主要失效形式是___。 A.
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Which of the following statements about thin films used in microelectronic devices is correct?
A、Films of the same material deposited by different deposition methods may have different properties.
B、Most thin film layers used in ICs are fabricated by deposition.
C、If chemical reactions are involved when a film is deposited on a substrate surface from a vapor phase, such a process is called chemical vapor deposition.
D、All vapor deposition processes operate at atmospheric pressure.
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