简述加权平均指数的编制原理。

单词拼写。

1. Richey was glad to have a chance to ______ (采访) a few foreigners who attended "Join the Fun

    in Jinling" yesterday.

2. We can enjoy f______ air in the countryside.

3. We feel quite ______ /ri'lkst / when having a music class.

4. The astronauts ______ (描述) what they had seen in space.

5. The abacus was invented in the sixth ______ /senturi/ by the Chinese.

6. He r______ to go to the party so I had to go there instead.

7. It was cold,but the trip was ______. (令人愉快)　　　

8. We hope it will be sunny tomorrow, for our ______ /'piknik/.

人体发育的整个过程的起点是                    （    ）

A．受精卵

B．胎儿

C．卵细胞

D．精子

到1935年初，新政成为公众激烈抨击或者热情支持的焦点，其中政治异见者（非左派，非右派）尖锐抨击“财阀”、“其他金融势力”，认为这些势力给国家带来贫困，而且向个体和社会实施专制。以下最能支持该观点的是

A．总统权力全面扩大

B．局部调整生产关系

C．实行美元贬值政策

D．国家大力干预经济

中国航空集团公司是中国唯一裁国旗和承担中国领导人专机任务的航空运输企业。