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【单选题】
在热力学标准条件下，0.100mol的某不饱和烃在一定条件下能跟0.200g的H2发生加成反应生成饱和烃，完全燃烧时生成0.300mol的C02气体，则该不饱和烃是（ ）。A.
-2或3
B.
2或3
C.
2或-3
D.
-2或-3
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皮皮学刷刷变学霸
举一反三
【简答题】Bob never does him homework so ____(care) as Mary. He makes lots of mistakes
【单选题】静脉的结构特点为
A.
管壁由三层组成,内层为间皮
B.
中膜内的平滑肌较动脉的丰富
C.
起于右心房,止于毛细血管
D.
其吻合不如动脉的丰富
E.
与动脉相比,其管壁薄、管腔大
【简答题】Bob never does him homework so ____as Mary. He makes lots of mistakes. (care)
【单选题】Bob never does him homework _______ Mary. He makes lots of mistakes.
A.
so careful as
B.
as carefully as
C.
carefully as
D.
as careful as
【判断题】排中律只是要求对二个相互矛盾的思想不能采取摇摆不定、模棱两不可的态度。它不涉及事物在一定条件下互为中介、相互转化的问题,也不涉及两类事物的中间形态问题。
A.
正确
B.
错误
【单选题】Bob never does him homework _______ Mary. He makes lots of mistakes.
A.
so careful as
B.
as carefully as
C.
carefully as
【单选题】动静脉吻合的结构特点( )
A.
管壁较厚,纵行平滑肌发达
B.
管壁较厚,环行平滑肌发达
C.
管壁较厚,结缔组织丰富
D.
管壁较薄,平滑肌稀疏分散
E.
管壁较薄,少许环行平滑肌
【单选题】What can we know about the West Caribbean Airways?
A.
The financial conditions of the airline was just OK.
B.
It would be bought by the Colombian Aviation Authority.
C.
This was its second time to have lost its airplane this year.
D.
The company is on the edge of going bankruptcy.
【单选题】What can we know about the West Caribbean Airways?
A.
The financial conditions of the airline were just OK.
B.
It would be bought by the Colombian Aviation Authority.
C.
This was its second time to have lost its airplane this year.
D.
The company is on the edge of going bankruptcy.
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