皮皮学，免费搜题
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【简答题】
请先阅读下面短文，掌握其大意，然后从方框中选择最佳单词，并用其适当形式填空。每个词限用一次。每空一分。 good live come classmate our trip with work swim draw teach club Nancy is from the USA but she 小题1: in Shanghai now. She is 12 years old. She 小题2:to Shanghai with her parents because they 小题3:here. Her father 小题4:English in her school and her mother is a doctor. Nancy and I are 小题5: . We study in No.21 Middle School in Shanghai. Nancy likes小题6:school very much. She is nice to others(其他人). She often helps us 小题7:our English and we often help her learn Chinese. Nancy loves 小题8:very much. Every Sunday she has a swimming class with twelve students. She is 小题9:at swimming and she is in the school swimming 小题10: .
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皮皮学刷刷变学霸
举一反三
【单选题】18下列有关试件达到磁饱和所需要磁场强度的叙述中,哪条是正确的?( )
A.
含碳量越低的碳钢，所需要的磁场越强
B.
淬火前的钢比淬火后的钢需要更强的磁场
C.
同一种钢，其冷加工比越大，需要的磁场越强
D.
矫顽力小的钢，一般需要强磁场
【简答题】目前纽约商业交易所是世界上最具影响力的能源产品交易所，上市的品种有（ ）。
【单选题】During the deck repair, ____ should be measured firstly before tail shaft is drawn out.
A.
the sinking of tail shaft
B.
the clearance of stern bearing
C.
the total flexure of both end bearing
D.
main engine crankshaft deflection
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