膀胱进入疝囊，并形成疝囊的一部分（） A.难复性疝 B.可复性疝 C.嵌顿疝 D.滑

呼吸性碱中毒的治疗原则是（）。

A.采取短暂强迫闭气法

B.用纸袋罩于口鼻外，使患者吸回呼出的CO₂

C.含5％CO₂的氧气吸入法

D.危重患者在严密监视下，可用药物阻断自主呼吸，然后气管插管进行辅助呼吸

E.治疗原发病

德国法学家耶林格说：“罗马曾三次征服世界，第一次是以武力，第二次是以宗教，第三次则以法律，而第三次的征服也许是其中最为平和，最为持久的征服。”对此解释正确的是

A．罗马法对罗马持久统治的维系起到了积极作用

B．罗马人一度用武力征服了整个欧洲

C．罗马法对古代世界各国的立法和司法产生了深远影响

D．罗马帝国时期实行宗教信仰自由

Here’s an amazing way to get a hard-boiled egg into a bottle, even though the mouth of the boiled is smaller than the egg! What’s more, you don’t even need to touch the egg to get it to go in!

For this experiment you will need:

·a hard-boiled egg

·a glass bottle with a mouth just slightly smaller than the egg (a fruit-drink bottle works well)

·a 8-cm by 8-cm(3-inch by 3-inch)piece of newspaper

·a match

Remove the shell from the egg. Set the egg on the mouth of the bottle to see that the egg does not fit through the mouth.

Light the paper. Remove the egg from the mouth of the bottle and drop the burning paper into the bottle. Before the fire goes out, set the egg back onto the mouth of the bottle. Within a few seconds the egg will squeeze(挤) through the mouth and into the bottle.

As it entered the bottle, the egg may have broken into pieces. This happens when the diameter(直径) of the egg is more than about 0.5 cm(about 3/16 inch) larger than the diameter of the bottle’s opening.

Why does the egg slide into the bottle, even though no one is pushing it? Because the pressure of the air is pushing it. Before the burning paper is put into the bottle, the pressure of the air inside is the same as outside. The burning paper, however, heats the air inside. This causes the air inside to expand. When the egg is placed on top of the bottle, it seals(封住) the bottle. When the fire goes out, the air inside cools. As it cools, the air contracts(紧缩), and the pressure of the air inside becomes less than the pressure outside. Then, the higher outside pressure pushes the egg into the bottle!

小题1:The best title of this passage can be      .

A．An interesting story

B．The pressure of the air

C．Egg in a bottle

D．Egg, bottle and match小题2:What don’t you need in this experiment?

A．Eggs.

B．Water.

C．Bottles.

D．Paper.小题3:Why will the egg break into pieces while entering the bottle?

A．Because of the burning paper.

B．Because the diameter of the egg is too larger than that of the bottles opening.

C．Because it is cool inside the bottle.

D．Because the pressure of the air inside is larger.小题4:What is the most important to get the egg into a bottle?

A．A match.

B．A fruit-drink bottle.

C．The pressure of the air.

D．The burning paper.

PCM的中M的含义是（）。

A.调制

B.模式

C.方法

D.管理

二进制数1010与十六进制数B2相加，结果为（）

A.273Q

B.274Q

C.314Q

D.313Q