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【多选题】
设计蜗杆传动时,通常选择蜗杆材料为 ,蜗轮材料为 ,以减小摩擦力。A.
钢
B.
铸铁
C.
青铜
D.
非金属材料
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【单选题】－What are you doing? －_______. It is too dirty. [ ]
A.
I'm doing my homework
B.
I'm playing computer games
C.
I'm cleaning the room
D.
I'm writing
【单选题】—What are you doing, my dear? —I am ________ for my glasses. I remember I have put it on the bookshelf. [ ]
A.
searching
B.
feeling
C.
finding
D.
looking
【单选题】— ______________ are you doing? — I'm doing my homework. [ ]
A.
What
B.
Whose
C.
Where
【单选题】I'm going fishing after I finish ________ my homework . [ ]
A.
to do
B.
to doing
C.
doing
【单选题】It’s 8 o’clock. My mother is reading a book. My sister and I _____.
A.
is doing my homework
B.
am doing my homework
C.
is doing our homework
D.
are doing our homework
【单选题】I was doing my homework _______ my mother was doing some sewing.
A.
during
B.
when
C.
while
D.
after
【单选题】I was doing my homework in my bedroom _______the light went out. I did it with a candle on.
A.
which
B.
while
C.
when
D.
where
【简答题】中国航油(新加坡)股份有限公司财务伦理执行 背景与情境: ( 1)融资活动 2004年10月20日,中国航油集团提前实施了本准备在年底进行的股份减持,将所持75%股份 中的 15%折价配售给部分机构投资者。此次配售以购买新加坡石油公司股份的名义进行,但事实 上中航油管理层已经决定放弃这次收购。此次配售筹得 1.08亿美元,全部贷给上市公司用于补 仓。然而,直至 11月30日向法院申请破产保护之前,...
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