在白炽灯照射下，从用手指捏紧的两块玻璃板的表面能看到彩色条纹，这是光的_____

We went to the swimming pool today. I had my first swimming lesson. At first I was very afraid. I hated it when the water went up my nose and into my ears. I kept my eyes closed all 小题1:_____ time.

Slowly, however, I became more confident. The teacher made sure 小题2:____ would always touch the bottom of the pool with my feet and 小题3:____ my head was above water. By the end of the lesson I could float on the water for 小题4:____ least a minute.

I’m glad I’m learning to swim; it can be lots of fun. Soon I hope to be able to dive into the pool 小题5:____ swim underwater.

连词成句。

1. a     big     What     fish   

2.  each   other    Father   and    mother    helps 

3. this    is    Who    boy    

4. your    She    is   sister   

5. on    Lucy   Come    Let's    watch    TV   

下列对皮肤具有渗透促进作用的是

A．凡士林

B．DMSO

C．丙二醇

D．氨基酸

E．Azone

2000年10月15日，国务院召开南水北调工程座谈会。此项工程是解决我国北方水资源严重短缺问题的特大型基础设施项目。长江的水资源丰富，人海水量约占94%以上，有条件调出部分水量。朱 * * 强调，此工作的关键在于搞好总体规划，全面安排，要认真搞好配套工程的规划和建设。既可以有效地拉动国内需求，开拓传统产业市场，又可以为经济持续发展增加后劲，促进经济良性循环。此事体现了( )

A．国家组织和领导社会主义经济建设的职能

B．事物是普遍联系的辩证法思想

C．一切从实际出发，主观符合客观的唯物主义观点

D．国家实施了强有力的宏观调控

疏忽误差一般什么情况下产生的？