个人因工作调动或改善居住条件而转让原自有住房，经向税务机关申报核准，凡在转让的住房居

有大漂石及坚硬岩石的河床不宜使用()。P64

A.土袋围堰 

B.堆石土围堰 

C.钢板桩围堰 

D.双壁围堰

阅读理解。

     Air is a colorless, tasteless and invisible (无形的)  gas that is around us. An"empty" drinking glass

and an"empty"room,in fact,are not really empty. Each is filled with air. When the glass is filled with

water, the water pushes the air out of the glass.

     Air, as a gas, has no definite (确切的) shape, but because it is matter, it takes up space and it has

weight. It is easy to prove (证明) that air is something that takes up space. Stuff a piece of dry cloth

into the bottom of a glass so that it will not fall out when the glass is turned upside down. Push the

upside-down glass,holding it straight up and down, into a jar of water till the glass is completely covered.

When the glass is taken out of the water, the cloth is still dry. The air inside the glass shows that it takes

up space and keeps the water from coming in.

1. Air has no definite shape because          .

A. it is a mixture      

B. it is a gas      

C. it is matter      

D. it is nothing

2. Since air is matter, it has            .

A. weight        

B. color      

C. taste        

D. shape

3. The word"stuff"in the passage means"         "in Chinese.

A. 撕裂          

B. 遮盖      

C. 取下        

D. 填塞

4. The experiment the writer tells in the passage          .

A. should be carried out in space

B. must be done in the lab

C. can be made in the room

D. only can be done in the open air

5. Which of the following gives us the correct picture of the experiment?

(W=water   A=air   C=cloth)

患者男性，55岁。急性重症胰腺炎行保守治疗，第15天出现尿少，24小时尿量为100ml，血钾5.8mmol／L，心率为125次／分，血压为98/60mmHg，呼吸频率为26次／分，体温为38.6℃。

目前该患者最有效的治疗措施是（）

A.25%葡萄糖溶液加胰岛素（3～5U）200ml，缓慢静脉滴注

B.机械通气

C.物理降温

D.血液净化

E.手术治疗

电动放风阀是根据（）电空阀的得失电来进行动作的。

A、制动

B、中立

C、重联

D、紧急

指挥性公文