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【单选题】
可以用熨烫的方法达到永久定型效果的是( )纤维制成的面料。A.
蚕丝
B.
棉
C.
涤纶
D.
羊毛
拍照语音搜题，微信中搜索"皮皮学"使用
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【单选题】听力原文：M: Excuse me, I'd like to send a registration letter to Houston, Texas. How much is the postage? W: Let me check. It's a dollar and 55 cents. Q: What is the probable relationship between the two ...
A.
Shop assistant and customer.
B.
Post clerk and customer.
C.
Store keeper and customer.
D.
Waitress and customer.
【单选题】听力原文：M: Excuse me. I'd like to place an advertisement for a used car in the Sunday edition of your paper. W: OK. But you have to run your advertisement all week. We can't carry it for just Sunday. Q: ...
A.
At a newsstand.
B.
At a newspaper office.
C.
At a car dealer's.
D.
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A.
At a news stand.
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At a car dealer's.
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At a publishing house.
D.
At a newspaper office.
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A.
At a newsstand.
B.
At a car dealer's.
C.
At a publishing house.
D.
At a shopping mall.
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【单选题】In a four-stroke/cycle diesel engine, after the completion of the power stroke, the piston will move________.
A.
up and draw in a fresh air charge
B.
down to burn off fuel
C.
down to compress the fuel air charge
D.
up and force out the exhaust gases
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