【单选题】【消耗次数：1】
塔式起重机的主要部件和安全装置等应进行经常性检查，（ ）不得少于一次，并应有记录。当发现有安全隐患时，应及时进行整改。
①
每天
②
每星期
③
每半个月
④
每月
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【多选题】
根据使用说明书的要求，应定期对塔式起重机各工作机构、所有安全装置、（ ）等进行检查，消除隐患。
①
制动器的性能及磨损情况
②
钢丝绳的磨损及绳端固定
③
液压系统、润滑系统
④
螺栓销轴连接处
⑤
轨道基础承载能力
随机题目
【单选题】
Having been asked to speak at the convention __________
①
some notes were prepared for Dr. Smith
②
Smith prepared some notes
③
The convention members were pleased to hear Dr. Smith
④
Some notes were prepared by Dr. Smith
【单选题】
For a successful business, friendly and __________ staff are essential.
①
sufficient
②
effective
③
efficient
④
respective
【单选题】
Mr. Chairman, could I raise a point about the plan?
①
Yes, Dr Chock
②
I think so, either
③
Yes, I hope not
④
No, I have no idea
【单选题】
These are certainly beautiful flowers. Thank you so much.
①
No, no. It’s nothing
②
You are welcome.
③
Yes, I agree
④
Yes, I think so, too
【单选题】
Excuse me. I don’t want to interrupt you but …
①
Can I help you?
②
Certainly, how dare you
③
It’s quite all right
④
Yes, you did
【单选题】
Latin America has an __________ labor force and natural resources.
①
wealthy
②
abundant
③
scattered
④
deposited
【单选题】
Could I use your dictionary for a moment?
①
It’s well
②
It doesn’t matter
③
By all means
④
I have no idea
【单选题】
Can I borrow your camera for a couple of days?
①
Yes, you may borrow
②
Yes, go on
③
Sure, here you are. Enjoy your journey
④
It doesn’t matter
【单选题】
Hardly ever _________ get a good job these days without a good education.
①
people might
②
people can
③
do people
④
have people
【单选题】
Dieters should try to reach and __________ a reasonable weight.
①
contain
②
secure
③
reserve
④
maintain