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【简答题】
有一台电动机，额定电压为380V，额定电流为22A，起动电流为140A，该电动机端子处的三相短路电流为16kA。试选择保护该电动机的RT0型熔断器及其熔体额定电流，并选择该电动机的配电线(BLV-500型)的导线截面及穿线的硬塑料管内径(环境温度为+30℃)。
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参考答案：
举一反三
【单选题】认为对外贸易应该遵循“卖给外国人的商品总值应大于购买他们的商品总值”的理论是()
A.
货币差额论
B.
贸易差额论
C.
幼稚产业保护论
D.
对外贸易乘数论
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【单选题】请选出耐温顺序正确的一组()
A.
营养体>孢子>芽孢
B.
芽孢>孢子>营养体
C.
孢子>营养体>芽孢
D.
芽孢>营养体>孢子
查看完整题目与答案
【判断题】深层空气过滤介质主要有两种,一种是以纤维状物(棉花、玻璃纤维、涤纶、微尼纶等)或颗粒状物质(如活性炭)为介质所构成的过滤器;一种是以微孔滤纸、滤板、滤棒构成的过滤器。
A.
正确
B.
错误
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【多选题】Why did I fall in love with the atmosphere after spending five months frolicking through the enchanting neighborhoods?
A.
There is something comforting about walking to the market each Sunday to be faced with the most vibrant array of fruits, vegetatbles and dairy products imaginable.
B.
There is warmth in saying bonjour to the man across the hall.
C.
There is calm in returning home from a day out in the city and looking out the window at the timeless cityscape.
D.
There is also excitement in knowing that you will never truly know Paris, there will be something new to see, something you never knew existed before.
查看完整题目与答案
【单选题】_____ did you sleep last night? I was reading too late to fall asleep. [     ]
A.
How long
B.
Why
C.
How soon
D.
How
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【单选题】—Did you _____ before the final exam last night, Mike? —Yes. I don't want to fall behind! [     ]
A.
keep up
B.
turn up
C.
stay up
D.
get up
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【简答题】Where did one of the runners fall down?
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【单选题】---- Did you find the film interesting? ----________, I nearly fall asleep half way through it.
A.
However
B.
On the other hand
C.
At the same time
D.
On the contrary
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【单选题】—Be careful! You might fall into the water. —Thank you. I ______ I _______ so close to the pool.
A.
didn’t know; am standing
B.
don’t know; am standing
C.
didn’t know; was standing
D.
didn’t know; would stand
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【单选题】听力原文：M: Jenny, could you forward this memo to all the staff? W: Sorry, the computer broke down just now. I'll do it for you as soon as 1 have it fixed. Q: What does the woman imply? (13)
A.
She has to post the memo instead.
B.
She has to turn down the man's request.
C.
She's not sure if the computer is fixed.
D.
She can't send the memo right now.
查看完整题目与答案
相关题目：
【单选题】认为对外贸易应该遵循“卖给外国人的商品总值应大于购买他们的商品总值”的理论是()
A.
货币差额论
B.
贸易差额论
C.
幼稚产业保护论
D.
对外贸易乘数论
查看完整题目与答案
【单选题】请选出耐温顺序正确的一组()
A.
营养体>孢子>芽孢
B.
芽孢>孢子>营养体
C.
孢子>营养体>芽孢
D.
芽孢>营养体>孢子
查看完整题目与答案
【判断题】深层空气过滤介质主要有两种,一种是以纤维状物(棉花、玻璃纤维、涤纶、微尼纶等)或颗粒状物质(如活性炭)为介质所构成的过滤器;一种是以微孔滤纸、滤板、滤棒构成的过滤器。
A.
正确
B.
错误
查看完整题目与答案
【多选题】Why did I fall in love with the atmosphere after spending five months frolicking through the enchanting neighborhoods?
A.
There is something comforting about walking to the market each Sunday to be faced with the most vibrant array of fruits, vegetatbles and dairy products imaginable.
B.
There is warmth in saying bonjour to the man across the hall.
C.
There is calm in returning home from a day out in the city and looking out the window at the timeless cityscape.
D.
There is also excitement in knowing that you will never truly know Paris, there will be something new to see, something you never knew existed before.
查看完整题目与答案
【单选题】_____ did you sleep last night? I was reading too late to fall asleep. [     ]
A.
How long
B.
Why
C.
How soon
D.
How
查看完整题目与答案
【单选题】—Did you _____ before the final exam last night, Mike? —Yes. I don't want to fall behind! [     ]
A.
keep up
B.
turn up
C.
stay up
D.
get up
查看完整题目与答案
【简答题】Where did one of the runners fall down?
查看完整题目与答案
【单选题】---- Did you find the film interesting? ----________, I nearly fall asleep half way through it.
A.
However
B.
On the other hand
C.
At the same time
D.
On the contrary
查看完整题目与答案
【单选题】—Be careful! You might fall into the water. —Thank you. I ______ I _______ so close to the pool.
A.
didn’t know; am standing
B.
don’t know; am standing
C.
didn’t know; was standing
D.
didn’t know; would stand
查看完整题目与答案
【单选题】听力原文：M: Jenny, could you forward this memo to all the staff? W: Sorry, the computer broke down just now. I'll do it for you as soon as 1 have it fixed. Q: What does the woman imply? (13)
A.
She has to post the memo instead.
B.
She has to turn down the man's request.
C.
She's not sure if the computer is fixed.
D.
She can't send the memo right now.
查看完整题目与答案
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