阿片类PCEA与PCIA相比，前者（） A.用药量较低，镇痛效果好 B.用药量较多，

阅读理解。

     Zhang Huimei is a famous Chinese popular star. Young people call her A-Mei. She comes from the

small town of Taidong, Taiwai. A-Mei has eight brothers and sisters. Her parents love her very much.

A-Mei has a very beautiful (动听的)voice. When she was schoolgirl, she sang songs(唱歌)on TV.

At last(最后), she becomes a poplar star. She works with another(又一个)popular star. Zhang

Yusheng. The two sing songs together(一起). It is a great success(成功). Now all Chinese people

know her and her beautiful voice.

1. Zhang Huimei is a ____.

A. movie star

B. popular star  

C. great actress

2. A-Mei has ____ brothers and sister. 

A. six  

B. seven  

C. eight

3. She works with another pop star ____.

A. Zhang Yu  

B. Zhang Yusheng  

D. Zhang Yimou

4. When she was ____, she sang songs on TV. 

A. a child  

B. a school girl  

D. famous

5. Which of the following is NOT true?

A. Her parents love her very much.  

B. She has a good voice.  

C. She isn't popular in Taiwan

小王按批发价买进一批牙刷，每枝0.35元，零售价每枝0.40元，当还剩下200枝没卖时，小王计算扣除所有成本已获利200元．商店买来牙刷多少枝？

仓储能够缩短后续环节的工作时间，加快货物的流通速度。（）

瓶装柠檬味苏打水(355毫升/瓶)

在25℃时建立下列平衡：2NO₂ N₂O₄ ΔH<0，若把烧瓶置于100℃的沸水中，下列情况：①颜色②平均摩尔质量③质量④压强⑤密度中不变的是

A．③④

B．③⑤

C．②④

D．①③