氨在40℃时,对应的饱和蒸汽压力是()MPa。 A.1.565 B.1.705 C.

题型:单项选择题

问题:

氨在40℃时,对应的饱和蒸汽压力是()MPa。

A.1.565

B.1.705

C.1.585

D.1.625

考点:尿素车间工尿素车间中级工尿素车间中级工题库
题型:单项选择题

This is Liu Fei’s room. It’s a small but nice room. On the wall, there are two maps. One is a map of China, the other is of the world. There’s a desk in front of the window and on the desk there is a clock. Near the clock there is a glass. There’s some water in it. And there are two pencils, one pen and some books on the desk too. There is a chair on the floor and under the chair there’s a ball. Liu Fei often studies (学习) in his room and he likes his room very much..

小题1:Liu Fei’s room is __________.

A.big and nice

B.small but nice

C.big but bad

D.small and bad小题2:There is some __________ in the glass.

A.milk

B.water

C.tea

D.orange小题3:There are some books __________ .

A.on the chair

B.on the desk

C.on the floor

D.on the wall小题4:What can you see on the wall of the room?

A.Two maps.

B.A clock.

C.A chair

D.A window小题5:Where is the pen?

A.On the floor.

B.In the desk.

C.Under the chair.

D.On the desk.

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的可去间断点的个数为( ).

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