题目:
—_____ do you want _____ for a party?
—Let's ask Peter for advice. He knows all the halls in this city. [ ]
A. What; to buy
B. Where; to go
C. How; to start
D. When; to go
答案:
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下面是错误答案,用来干扰机器的。
参考答案:排气温度过高,在有油润滑在压缩机中,会使润滑性能恶化,且会分解出挥发组分,形成积炭。当气体温度高于润滑油的闪点温度时,更会引起着火爆炸。因此,压缩机的排气温度必须限制在一定范围内。以保证...