利用托里拆利实验测大气压时，可以确认管内进入了少量空气的现象是

题干

利用托里拆利实验测大气压时，可以确认管内进入了少量空气的现象是（）

A：管内水银面的高度略小于760 mm

B：无论怎样使管倾斜，水银都不会充满全管

C：使管倾斜时，管内水银柱长度增加

D：将管在槽中轻轻上提，管内水银柱高度不变

上一题下一题 0.0难度选择题更新时间:2019-09-10 12:09:18

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B

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阅读下列短文，从每题所给的四个选项（A、B、C、D）中选出最佳选项。

A

Come and see the Indian elephants and the new tigers from America. The monkeys are waiting to meet you, and the pandas from China are waiting to take pictures with you. The lovely koalas from Australia are waiting to laugh at you, and the giraffes from Africa are waiting to look down on you. The parrots want to speak to you!

TICKETS

Grown-up: $4.00 Children: Over 12 $ 2.00; Under12 $ 1.00

Opening time: 8.00 a.m.- 4.00 p.m.

Except Friday: 10.00 a.m.- 3.00 p.m.

Keep the zoo clean!

Do not touch, give food or go near animals.

题干

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