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【单选题】
用火棉胶制备半透膜时是否需要远离火源( )
A.
需要
B.
不需要
C.
不确定
D.
无法确定
题目标签:
棉胶
半透膜
火棉胶
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【单选题】Year after year a dedicated Swedish chemist worked to find a substance which, when (1)_____ nitroglycerine(硝化甘油), would make explosives safer to handle (2)_____ weakening their force. He had a persona...
A.
mixing with
B.
mixed with
C.
was mixing with
D.
was mixed with
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【单选题】药物以高分子形式分散于分散介质中所形成的分散体系,如胶浆剂、火棉胶剂、涂膜剂等,属于()
A.
热力学稳定体系
B.
热力学不稳定体系
C.
动力学稳定体系
D.
动力学不稳定体系
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【单选题】用火棉胶包埋的组织,常用下而哪种试剂处理( )
A.
乙醚
B.
二甲苯
C.
松油醇
D.
香柏油和丁香油
E.
水杨酸甲酯和苯胺油
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【单选题】所谓半透膜,是指()。
A.
所有物质都只允许一半通过膜,另一半被隔在膜外
B.
膜是半透明的,因此可以观察到细胞的内部结构
C.
膜只使小分子物质通过,而大分子物质不能通过
D.
膜只允许物质进入,而不允许物质排出
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【单选题】Year after year a dedicated Swedish chemist worked to find a substance which, when (1)_____ nitroglycerine(硝化甘油), would make explosives safer to handle (2)_____ weakening their force. He had a persona...
A.
called
B.
known
C.
by name
D.
named
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【简答题】【名词解释】火棉胶剂
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【简答题】1851年,英国雕塑家()发明了“火棉胶摄影法”
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【简答题】非金属垫片材料有()、()、石棉—胶板及合成树脂。
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【单选题】用火棉胶包埋的组织,常用下面哪种试剂处理()
A.
乙醚
B.
二甲苯
C.
松油醇
D.
香柏油和丁香油
E.
水杨酸甲酯和苯胺油
查看完整题目与答案
【单选题】Year after year a dedicated Swedish chemist worked to find a substance which, when (1)_____ nitroglycerine(硝化甘油), would make explosives safer to handle (2)_____ weakening their force. He had a persona...
A.
believing
B.
regarding
C.
regarded
D.
believed
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