若用氧—乙炔焰在气割过程中发生回火现象,应紧急关闭气源,使回火在割炬内迅速熄灭。正确

题型:单项选择题

问题:

若用氧—乙炔焰在气割过程中发生回火现象,应紧急关闭气源,使回火在割炬内迅速熄灭。正确的关闭顺序是______。

A.乙炔阀—氧气阀

B.混合气阀—乙炔阀

C.氧气阀—混合气阀

考点:锅炉设备装配工初级锅炉设备装配工初级
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将1mol CH4和一定物质的量的Cl2混合均匀,用漫散光照射使CH4与Cl2发生取代反应。反应后CH4与Cl2均无剩余,且生成了等物质的量的四种取代物,参加反应的Cl2物质的量为____________。

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等腰三角形的周长为13,其中两边之差为1,则它的腰长为(  )
A.4B.4或
11
3
C.
14
3
D.4或
14
3
题型:单项选择题

临床触诊检查的注意事项,不正确的是()。

A.加强保暖,防止患者着凉

B.检查者手部温度应适宜,不可过凉

C.检查者的手指甲应剪短

D.压力适当,由浅入深

E.先触患侧,再触诊健侧

题型:单项选择题

Mr. Brown first went to look at the underground-fire when he was seven. “Through the hole in the earth you could see the orange fire, but you had to look fast because it was so hot,” said Mr. Brown. In 1898,he saw the fire once more.

Now, we can only see the smoke. The fire Mr. Brown saw is not the underground-fire. In fact ,there are 260 coal fires in the world. They are harmful and dangerous. Then how to put them out?

Scientists have tried to set fire to underground coal to speed up the fires. In this way, the burning of underground coal would be soon finished.

小题1:Mr Brown said that we had to take a fast look at the fire because_________.

A.it was in the hole

B.it was very hot

C.it was orange

D.it was harmful小题2:How many coal fires are there in the world?

A.There’s only one

B.It’s hard to say

C.There are 260

D.The article doesn’t tell us小题3:What’s one of the best ways to put out the underground fire?

A.To cover the holes with stones

B.To speed the fire

C.To see the fire burning

D.To do some experiments小题4:What is the best title for the article?

A.Watching the Underground-fire

B.A Way to Put out the Underground Coat Fires

C.The Burning Earth

D.Coal and Coal Fires

题型:单项选择题

下列各项,不属于理中丸主治病证的是()

A.胸痹

B.失眠

C.崩漏

D.呕吐

E.小儿慢惊

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