【单选题】【消耗次数：1】
钢丝绳在使用中多次弯曲造成的（）是钢丝绳破坏的主要原因之一
①
A弯曲疲劳
②
B拉伸
③
C扭转
④
D变形
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相关题目
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吊装钢丝绳断裂的主要原因有（）
①
A吊装角度太大，导致吊装绳抗拉强度超过极限值
②
B钢丝绳品种规格选用不当
③
C使用已达到报废标准的钢丝绳捆绑吊装物件
④
D吊装绳和物件之间的接触处无垫衬，造成棱角割断吊装绳
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钢丝绳出现下列哪些情况时必须报废和更新？（ ）;
①
钢丝绳断丝现象严重
②
断丝的局部聚集
③
当钢丝绳磨损或锈蚀严重，钢丝绳的直径相对于公称直径减少7%或更多时既使未发现断丝
④
钢丝绳失去正常状态，产生严重变形时
⑤
绳芯挤出
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吊索钢丝绳端部采用编结固接时，编结部分的长度不得小于钢丝绳直径的（），并不应小于（）。
①
10倍，200mm
②
20倍，300mm
③
10倍，300mm
④
20倍，200mm
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Congratulations! You won the first prize in today’s speech contest.
①
Yes, I beat the others
②
No, no, I didn’t do it well
③
Thank you
④
Dont mention it.
【单选题】
Children learn best by studying at their own __________ .
①
rate
②
speed
③
pace
④
growth
【单选题】
How about going to the cinema tonight, Jane?
①
I don’t think so
②
I’m sorry. I have to drive my mother home tonight
③
Never mind
④
Take it easy
【单选题】
Would you like to go fishing with us now?
①
No, I don’t like
②
It sounds interesting but I have lots of homework to do
③
I won’t tell you
④
Oh, it is well
【单选题】
They claim that __________ 1,000 factories closed down during economic crisis.
①
sufficiently
②
approximately
③
considerably
④
properly
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Hello, I’d like to speak to Mark, please.
①
Yes, I’m Mark
②
This is Mark speaking
③
It’s me here
④
This is me
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Being the __________ sponsor of this competition, he has got great opportunities for advertising his products.
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principal
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chief
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main
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primary
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Hello, may I talk to the manager about the price?
①
Sorry, he is out at the moment
②
No, you can’t
③
Sorry, you can’t
④
I don’t know
【单选题】
My grandmother’s taken ill and I’ve got to go down to the hospital.
①
We’re going to the same place
②
Very sorry to hear it. I hope it’s nothing serious
③
Really?
④
Let me go with you
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The committee is due to __________ its report by the end of this year.
①
release
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relieve
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relate
④
retain