直接作用于中枢神经系统，使之兴奋或抑制，连续使用能产生依赖性的药物是（） A.精神药

Seeing the road _________ with snow and cyclists falling down here and there, we decided to walk to our office.

A．to block

B．blocking

C．blocked

D．to be blocked

胆肠吻合术后期最常见的并发症是（）

A.胆管损伤

B.急性胰腺炎

C.胆道出血

D.复发性胆管炎

E.肠管损伤

根据短文内容和所给汉语提示，写出短文空白处各单词的正确形式。每空限填一词。

The Natural Park was set up many years ago. It lies in the _ 小题1:_ （南方的）part of our country. It is said that__小题2:__ （数百万）of people go there every year. But for me, it is the __小题3:__ （第一）time to go there. Everything there is interesting but the thing that attracts me most is the house made of __小题4:_    （木头）. It was _小题5:__（建造）by hand. It’s very old but I think it’s very __小题6:__（漂亮的）.There is a sign saying “No __小题7:__ (吸烟)”over the door. The toilet outside is clean. The guide says that it was just __小题8:__（修复）last month. Trees can be seen everywhere, but we don’t see any __小题9:__（垃圾）.It has been sorted by the workers there. They know it’s __小题10:__（浪费的）to throw it away without being recycled.

电容器和触电并联，可消除触电间由于自感电动势所产生的火花，电容器的电容量一般为（）

A、0.15－0.25μF

B、0.25-0.5μF

C、0.5-1.0μF

D、0.3-0.35μF

以下哪种物质不会引起中毒（）。

A.工业性有毒物质

B.放射线

C.农药

D.药物

E.有毒动植物