下列四种空分流程,哪种是目前最先进的()A.切换式换热器全低压流程。 B.增压型常温

题型:单项选择题

问题:

下列四种空分流程,哪种是目前最先进的()

A.切换式换热器全低压流程。

B.增压型常温分子筛净化流程。

C.蓄冷器全低压流程。

D.增压型常温分子筛全精馏无氢制氩流程。

考点:制氧工考试制氧初级工制氧初级工题库
题型:单项选择题

男,50岁,左侧耳鸣3年,左耳聋1年,口角右偏1周,最可能的定位诊断为()

A.鞍区

B.左小脑脑桥角

C.左侧脑桥

D.左侧延髓

E.以上都不是

题型:单项选择题

Mark Zuckerberg was born on May 14, 1984. As a little kid, he loved creating little fun computer programs, especially communication tools and games.

When he was a student at Harvard University, Mark founded (创建)Facebook on February 4, 2004. Through Facebook, Harvard students could communicate with each other. Facebook quickly became a great success at Harvard and more than two-thirds of the school’s students used it in the first two weeks. It soon spread further to any university students, then high school students, and, finally, to anyone aged 13 and over in the US. 

Facebook developed fast and became popular. People can communicate with others, add friends, and send them messages. Now, it has more than 175 million users all over the world.

Many big companies have offered a very high price to buy Facebook, but Mark refused them all. His reason was simple. “We are not planning to sell it. We don’t want to make money from it. We just hope Facebook will make it easier for people to know each other.”

Sometimes the simplest ideas go the furthest. We hope Mark can go much further, maybe even further than Bill Gates!

小题1:What was Mark interested in when he was a little kid?

小题2:Where was Facebook first used in the United States?

小题3:How many people use Facebook in the world now?

小题4:Why did Mark not want to sell Facebook to other companies?

小题5:What do you think of Mark Zuckerberg? (请考生自拟一句话作答)

题型:单项选择题

如图实验装置用于验证某些物质的性质。在试管A中装入足量的固体NaHCO3,D为固定蚊香的硬纸片。试回答下列问题:

(1)在A试管内发生反应的化学方程式是___________________。

(2)B装置的作用是__________________________________。

(3)在双球干燥管内发生反应的化学方程式为_______________。

(4)双球干燥管内观察到的实验现象是__________________________

____________________________________________________________________。

上述实验现象说明________________________________________________________。

(5)若将干燥管内的Na2O2换成Na2O,则双球干燥管内观察到的实验现象是_________。

题型:单项选择题

第一位用有害液体流入大脑来解释变态心理产生的病因的学者是( )。

A.Freud
B.Cannon
C.Pavlov
D.Hippocrates

题型:单项选择题

自然灾害发生后,救灾资金的承担原则是()。

A、分级负担

B、统一负担

C、地方为主

D、中央为主

E、地方承担

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