单项选择题
聚合物熔体的流变行为服从牛顿流动规律。
A、正确
B、错误
聚合物熔体的流变行为服从牛顿流动规律。
A、正确
B、错误
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单项选择题
The governments, environmental protection departments and enterprises of China have legal responsibilities and obligations for the emergency management of environmental emergencies. The legal responsibilities of the governments do not include ( )
The governments, environmental protection departments and enterprises of China have legal responsibilities and obligations for the emergency management of environmental emergencies. The legal responsibilities of the governments do not include ( )
A.Timely report to relevant companies involved in environmental emergencies
B.Carry out monitoring and early warning, and take effective emergency response measures when environmental emergencies occur
C.Post-evaluation and reconstruction
D.Develop emergency plan, establish emergency training and carry out emergency drill