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【多选题】
轴承过高的故障排除方法包括（ ）。A.
离心式通风机主轴或主轴上的部件与轴承箱摩擦，需要检查哪个部位摩擦，然后加以处理。
B.
电机轴与风机轴不同心，使轴承箱内的内滚动轴承别劲，需要调整两轴同心度。
C.
轴承箱体内润滑脂过多。需要减少油脂到箱内润滑脂为箱体空间的 1/3 ～ 1/2 。
D.
轴承与轴承箱之间有间隙而松动，轴承箱的螺栓过紧或过松，需要调整螺栓。
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举一反三
【单选题】Consider the following statement on a RANGE partitioned table: ALTER TABLE orders DROP PARTITION p1, p3; What is the outcome of executing the above statement?（）
A.
A syntax error will result as you cannot specify more than one partition in the same statement
B.
All data in p1 and p3 partitions are removed and the table definition is changed
C.
All data in p1 and p3 partitions are removed, but the table definition remains unchanged
D.
Only the first partition (p1) will be dropped as only one can be dropped at any time
【单选题】I advised _____ , but he turned me a deaf ear.
A.
him not to smoke again
B.
him to smoke not again
C.
him to not smoke again
D.
not him to smoke again
【简答题】A．He was smoking a pipe. B．He was learning to smoke. C．He was studying a tobacco plant. D．He was throwing tobacco leaves on a fire.
【单选题】Why did he smoke?
A.
Because he couldn't sleep well.
B.
Because he had no appetite.
C.
Because he stayed up late.
D.
Because he was too tired.
【单选题】In the street a man wants to smoke a cigarette, but he has no match. He asks a stranger.
A.
' Got a match, mate?'
B.
' Would you be so kind as to give me a match?'
C.
'Can I borrow your fire?'
D.
' Excuse me, would you mind if I borrowed your match as I want to smoke?'
【单选题】He gave up _ two years ago. That's to say, he is a non-smoker now. [ ]
A.
smoke
B.
smoking
C.
to smoke
D.
smoked
【简答题】P58 Task 5 Listening to the conversation and discuss the following questions. What are the guest's requests? What's the rate of typing and printing?
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