问题 选择题

在电梯加速上升的过程中,站在电梯里的人(  )

A.所受支持力做负功,机械能减少

B.所受支持力做正功,机械能减少

C.所受支持力做负功,机械能增加

D.所受支持力做正功,机械能增加

答案

由于人加速上升,合力向上,所以支持力要大于人的重力,支持力的方向与人的位移的方向相同,所以支持力对人做了正功,人的机械能增加,所以ABC错误,D正确.

故选D.

材料分析题

情景一:妞妞从小就喜欢对着镜子打扮自己,穿上妈妈的高跟鞋,还要戴上妈妈的各种首饰,大家都叫她“美丽的小公主”。渐渐地,上了初中的妞妞,用于打扮自己的时间越来越多。有时候,在上学前要花掉一个多小时来化妆,穿的衣服非常另类……

(1)妞妞这样的生活情趣值得我们学习吗?请说出你的理由。

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情景二:慢慢地,妞妞发现大家都不愿意和她交朋友,她自己也很苦恼。于是,她就想改变自己,让大家喜欢她。妞妞发现班里有些同学下课后经常在一起谈论自己崇拜的偶像,谈论的内容包括这些偶像的生日、爱好、星座等等,于是妞妞就开始学她们那样,开始寻找自己喜欢的偶像,妞妞觉得,只要和他们一样,她就能交到好朋友。

(2)妞妞这样的做法对吗?这样的做法是一种什么行为?

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情景三:妈妈发现妞妞的这些变化,便找妞妞谈心。妞妞向妈妈说出了。里的苦闷。她想交到朋友,可是不知道该怎样去做。妈妈对她说不要总是盲目地跟着别人学,要做最好的自己。妈妈给她报了舞蹈班,在舞蹈班里,妞妞的资质最好,学的也最快,老师还让妞妞当小老师教其他的同学。就这样,妞妞身边的小伙伴越来越多,大家都跟着妞妞学起了跳舞,妞妞别提心里有多高兴了!

(3)妞妞参加了舞蹈班后,你觉得她收获了什么?

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阅读理解

QINGDAO--Water and power supplies have been restored in the East Chinese city of Qingdao, the site of an oil pipeline explosion on Friday, the local government said on Monday.

Crude oil began leaking(泄漏)from the pipeline at 3:00 an Friday in Qingdao in Shandong province. The valves(阀门)of the Huangdao oil warehouse were shut about 15 minutes later.

The oil spill(泄漏的石油)then flowed into the city’s rainwater pipe network, which empties into Jiaozhou Bay. Explosions occurred at two locations around 10:30 am Friday when workers were clearing the spill.

According to the local government, about 85 percent of public heating and 90 percent of the gas supply were also brought back to normal as of Monday.

Residents who have been taken to the temporary settlements are receiving bottled water and bread.

Many schools and kindergartens have reopened classes after Friday’s oil pipeline explosion. No injures and deaths of students or teachers have been reported following the explosions at an underground pipeline operated by Sinopec. The school buildings of one middle school in the district were seriously damaged during the explosions. Education authorities have arranged psychological help for students and teaching staff. All other 18 schools and kindergartens in the district reopened classes on Monday.

As of Monday noon, the death toll from the explosion had risen to 55, with 9 people still missing and 136 hospitalized. According to local police, 49 bodied have been identified so far, and 42 of them were male victims. As of Monday morning, the blood supply in Qingdao was enough for the injured after more than 950 people in the city donated more than 340,000 ml of blood in the wake of the incident.

小题1:The underlined word “restored” in the first paragraph probable means “     ”.

A.cut

B.destroyed

C.recovered

D.repaired小题2:Explosions happened when       .

A.workers were cleaning the spill

B.valves of the oil warehouse were shut

C.the oil spill flowed into the city’s water network

D.crude oil began to leak from an underground pipeline小题3:We can learn that by Monday noon the deaths in the explosion reached at least       .

A.64

B.49

C.55

D.42小题4:We can learn from the passage that         .

A.everything was brought back to normal right after the explosion

B.no measures were taken to help the suffering people out of trouble

C.no more dead body was found after Monday noon

D.all the 19 schools in the district were affected by the explosion