问题 填空题

据报道,一厂家发明了一种“手机自生能”技术.手机上装上特制电池,上下左右摇晃手机即可产生电能,每摇一分钟可通话两分钟.如果将手机上下摇动一次,相当于将300g的重物举高l0cm,每秒约摇一次.则根据报道可知,每摇一次可以获得的电能为__________J;该手机使用时的功率约为___________W。(取g= 10N/kg)

答案

0.3;0.15

阅读理解

阅读理解。

    After many days of waiting, the Olympic mascots were finally chosen at 8pm on November 11, 2005.

The Olympic mascots are the Olympic torch (火焰), the fish, the panda, the Tibetan gazelle (藏羚羊) and

the swallow (燕子). The panda is named "Jingjing". He was chosen because he makes children smile and

brings the blessing of happiness wherever he goes. He was chosen to show China's wish to protect nature.

    Unlike the well-known panda, the Tibetan antelope is considered much sportier than other chosen animals.

"I can run 70-100 km per hour. So you see, I'm a perfect symbol (象征) of the Olympics-'higher, faster and

stronger'." Says the athlete, whose name is "Yingying".

    The fish, "Beibei" stands for prosperity (繁荣). She will represent (代表) water sports. "Nini", the swallow

stands for a good luck and wish for a better life. She will represent gymnastics (体操). The Olympics flame,

"Huanhuan" gives out enthusiasm (热情) and best wishes for the Olympics. He will represent ball games.

    Many teenagers are surprised that Beijing will have mascots but very excited that they will have more

choices when shopping for souvenirs (纪念品).

    "I hope there will be a cartoon in which these mascots are the main characters, doing different sports. So

the whole world will have a better understanding of the Chinese spirit," said one teenager.

1. There are ______ Olympic mascots for the 2008 Beijing Olympic Games. [ ]

A. four kinds of

B. three kinds of

C. five kinds of

D. two kinds of

2. The panda, "Jingjing" was chosen ______.[ ]

A. to show China's wish to protect nature

B. as a symbol of the spirit of the Olympics

C. to give best wishes for Olympics

D. to show Chinese's love

3. ______ will represent gymnastics. [ ]

A. The fish named "Beibei"

B. The swallow named "Nini"

C. The Olympic flame named "Huanhuan"

D. The fish named "yuyu"

4. Zhou Xia enjoys all kinds of ball games very much, so she may buy             as a souvenir. [ ]

A. Nini

B. Yingying

C. Huanhuan

D. Beibei

5. Mr Brown's son likes diving, he may buy his son            as a birthday present. [ ]

A. Jingjing

B. Beibei

C. Huanhuan

D. Nini

选择题