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【单选题】
测定塑料的氧指数时，用扩散点燃法点燃试样时，下列说法正确的是（ ）。A.
Ⅴ型试样在离点燃端10 mm和60 mm处画标线
B.
Ⅴ型试样在离点燃端50 mm处画标线
C.
Ⅰ、Ⅱ、Ⅲ、Ⅳ或Ⅵ型试样在离点燃端50 mm处画标线
D.
Ⅰ、Ⅱ、Ⅲ、Ⅳ或Ⅵ型试样在离点燃端10 mm和60 mm处画标线
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】妊娠合并淋菌感染下列哪项是不恰当的
A.
对可疑感染者取分泌物培养可确诊
B.
易发生胎儿宫内感染
C.
妊娠早期可致感染性流产
D.
治疗首选喹诺酮类药物
E.
淋病高发区孕妇产前常规筛查淋菌
【判断题】() When we say dogs are friends of humans, we usually think of them as a mental abstraction.
A.
正确
B.
错误
【单选题】《安全生产法》的立法宗旨是为了加强安全生产监督管理，防止和减少生产安全事故，（），促进经济发展，制定本法。
A.
维护社会秩序
B.
保障社会主义现代化建设
C.
保障人民群众生命和财产安全
D.
维护公共安全
【单选题】When making a comparision between the past and the present condition of a place , we might say ' It's gone to the dogs '. What does it mean ?
A.
It is in a much better condition now than it was before .
B.
It is in almost the same condition now as it was before .
C.
It is in a much worse condition now than it was before .
D.
There are many dogs here now , but there weren't brfore .
【简答题】We have heard it repeatedly: most people do not get enough exercise. Yet when we look at our dogs, we say we do not give them enough exercise either. Do dogs enjoy exercise? Of course they do. Just as...
【单选题】《安全生产法》的立法宗旨是，为了加强安全生产监督管理，防止 和减少生产安全事故，( )，促进经济发展。
A.
权责一致
B.
保障人民群众生命和财产安全
C.
预防为主、安全第一
D.
社会监督、综合治理
【简答题】用户数据报协议
【简答题】用户数据报协议
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