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【简答题】
幼儿园艺术性的空间环境,应该在( )和( )上符合幼儿的审美特点,给幼儿一美的视觉享受。
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举一反三
【简答题】求下列混合物的数均分子量、重均分子量和分子量分布指数。 a.组分A:质量10g,分子量30000 b.组分B:质量5g,分子量70000 c.组分C:质量1g,分子量100000
【单选题】Butcher reached for the handgun usually( )in the sled, but couldn't find it.
A.
keeping
B.
to be kept
C.
kept
D.
to keep
【单选题】听力原文：Five. Which painting does the woman decide to buy? Woman: They're all nice, but you see a lot of flowers everywhere these days, don't you? So that wouldn't be my choice. The same goes for animals...
A.
B.
C.
【单选题】The author implies that ______.
A.
going into a supermarket hungry, you may buy more than you plan to
B.
the quality of generic items is usually high and the prices are relatively low
C.
discount clothing stores are good places to go to
D.
advertisements sometimes don't tell the truth
【简答题】求下列混合物的数均分子量、重均分子量、和分子量分布指数。(1)组分1:质量分数=0.5,相对分子质量为10000;(2)组分2:质量分数=0.4,相对分子质量为100000;(3)组分3:质量分数=0.1,相对分子质量为1000000.
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