在太阳系九大行星中，没有卫星的两颗行星是（）。A、水星和金星 B、金星得火星 C、木星和

如图所示，用手电筒对着平面镜中的像A^′B^′照射时，会发现像比原来亮多了，这是因为

A．光照到像上，所以像变亮

B．镜子比原来亮，所以像也比原来亮

C．光照到镜子上发生反射，使物体变亮

D．光照射像后，人的感觉不同

据统计，局麻药不良反应中变态反应的发生率()

A．2%

B．4%

C．8%

D．15%

E．30%

针灸治疗痛经实证应取哪些经脉( )

A．任脉、足厥阴经
B．冲脉、足厥阴经
C．督脉、足厥阴经
D．任脉、足少阴经
E．任脉、足太阴经

阅读理解。

     Today Newtown is a very clean place. Many years ago, however, there were millions of rats in Newtown.

They attacked (袭击) the cats and dogs. Sometimes a great number of them knocked down a man or woman

walking home at night. The rats were very large in size and they harmed many people. The government ordered everybody to kill rats. Most people were lazy, so they did not kill many.

     Then the government promised to pay some money for each dead rat. That made the people very happy.

They killed thousands of rats every day. A government officer put all the dead rats in a big pile. Sometimes a

man brought hundreds in one day. After two weeks there were not many rats in the city, but people still

brought many rats to the government office. The government officer thought that people were stealing dead

rats from the pile. He ordered his men to dig a deep hole and put the rats in it. Soon there were no more rats

and the government did not pay any more money.

 What would be the best topic for this passage?

A. How Newtown Became a Very Clean Place.

B. How to Kill Rats.

C. Newtown-City of Rats.

D. How Newtown People Became Rich.

马克思的《资本论》主要阐述了什么理论（）

A.历史唯物主义

B.无产阶级革命理论

C.剩余价值学说

D.辩证唯物主义