Why does the author mention the discovery of air pressure? According to the passage, which of the following is not true?

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问题 Why does the author mention the discovery of air pressure?
According to the passage, which of the following is not true?

选项 A、Galileo did not solve the problem of the water-pump.
B、When a scientist tries to establish a scientific law, he must collect much information.
C、An original hypothesis is not always accepted.
D、Using a good vacuum pump, it is possible to raise water from the bottom of a building to the roof 50 feet above.

答案D

解析

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大学英语四级

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Why does the author mention the discovery of air pressure? According to the passage, which of the following is not true?

大学英语四级

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RussiaisthelargesteconomicpowerthatisnotamemberoftheWorldTradeOrganization.Butthatmay【B1】______.LastFriday,

A、Shehasseenadoctorrecently.B、She’sconcernedaboutmedicalcare.C、She’sunabletoattendthestudysession.D、Shementio

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治疗难治性腹水的适宜方法是

油罐内发生火灾时，不能选用的灭火剂是()。

旁站监理人员的主要职责是( )。

负强化就是惩罚。

破坏死锁的4个必要条件之一就可以预防死锁。假如规定一个进程在请求新资源之前首先释放已占有的资源则是破坏了哪个条件?

Cisco路由器查看路由表信息的命令是()。

旁站监理人员的主要职责是(　　)。