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【单选题】
设N A 为伽德罗常数的值，下列叙述正确的是（ ）A.
24g镁原子最外层电子数为N A
B.
1mol甲烷分子所含质子数为10N A
C.
标准状况下，22.4L酒精分子数为N A
D.
0.1mol铁与足量盐酸反应转移的电子数为0.3N A
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【简答题】In the West we are familiar with ballets like Swan Lake. But there’s another classical dance form with a long history 1__________ has only recently burst onto the world scene. It is called Chinese cla...
【简答题】低压配电系统电能质量的检测都包括哪些内容?
【单选题】Recently, there’s been much theft in the schools. What security measures shall we take then?
A.
最近，校内发生了盗窃事件，应该采取什么防范措施?
B.
最近，校内盗窃事件不断，怎样防范才是适当的?
C.
最近，校内多次发生盗窃事件，校方该采取什么措施?
D.
最近，校内多次发生盗窃事件，可以采取什么防范措施?
【单选题】Recently, there’s been much theft in the school. What security measures shall we take then?
A.
We can install cameras and set up police line for you.
B.
We can install infrared surveillance cameras and intrusion alarms for you.
C.
We can install alarming system for you.
D.
We can equip techniques and electronic system for you.
【简答题】哪些环节容易导致食品污染?
【简答题】联系实际,谈谈研究消费者行为有何意义。
【简答题】Read the following passage and choose the best answer to each question.Interview: for or against? It often happens that a number of applicants with almost identical qualifications and experience all a...
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