皮皮学,免费搜题
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搜题
【单选题】
肺炭疽采集的标本是
A.
水疱
B.
血液
C.
粪便
D.
脑脊液
E.
尿液
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【简答题】塑料的相容性
【单选题】带有以下哪种标号的塑料盛水容器,材料稳定性相对较高( )。
A.
1或01
B.
5或05
C.
6或06
D.
3或03
【单选题】Every father should realize the important part _______ in his child’s education.
A.
which he has
B.
that he plays
C.
which he makes
D.
that he owns
【单选题】下列属于应用塑料相容性得到塑料合金的是
A.
聚甲基丙烯酸甲酯
B.
ABS
C.
改性尼龙
D.
三聚氰胺-甲醛塑料
【判断题】不同塑料的相容性与其分子结构有一定关系,分子结构相似者较易相容,分子结构不同时较难相容 。
A.
正确
B.
错误
【单选题】自凝塑料相比于热凝塑料容易变色,其主要原因是
A.
残留的叔胺和阻聚剂继续氧化
B.
自凝塑料的多孔结构容易沉积色素
C.
自凝塑料的着色剂容易与唾液发生反应
D.
自凝塑料的质量普遍偏差
E.
以上都不对
【单选题】If one wants to take part in the sweepstake, which of the statement is true?
A.
He should purchase for entry.
B.
He should be at age of 18.
C.
He doesn't any acceptance at all.
D.
He need to follow the law and rules.
【判断题】在塑料中加入能与树脂相容的高沸点液态或低熔点固态的有机化合物,可以增加塑料的塑性、流动性和柔韧性,并且可改善成型性能,降低脆性。 ( )
A.
正确
B.
错误
【单选题】The second half of his voyage was __________ erous part, during which he sailed round the Cape Horn.
A.
more
B.
most
C.
the most
D.
the more
【简答题】The second half of the voyage was by far the ______ part, during which he sailed round the treacherous Cape Horn. (erous)
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