题目内容

【题目】第六次人口普查数据显示,中国内地的流动人口已达2.6亿,十年间增长80%,平均每6个人中就有1个是流动人口。有数据表明,中国流动人口平均年龄不到30岁,“80后”年轻人正逐渐成为流动人口的绝对主力。据此回答下列各题。

1材料反映出我国人口发展的新变化是(  )

①从早婚早育到晚婚晚育 ②从多育多子到只生一个

③从“学而优则仕”到“全民皆商”④从安土重迁到“四海为家”

A. ①② B. ②③ C. ③④ D. ②④

2材料中所述现象,形成的根本原因是(  )

A. 庞大的人口压力 B. 社会生产力的发展

C. 改革开放的国家政策 D. 工商业者成为光荣的劳动者

【答案】

1C

2B

【解析】

1我国人口流动日趋活跃,他们外出的主要目的是务工和经商,所以C正确。

2这些文化新时尚形成的根本原因是社会生产力的发展,所以B正确。

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★★★☆☆

A new phone app uses vibrations from smartphones to alert people about earthquakes. 1 phone app recognizes sudden shaking of the earth’s surface through sensors in smartphones.

The new app is called MyShake. It is the work of four 2 (research) at the University of California, Berkeley. They said they created a worldwide warning system 3 would inform people and give them time to prepare. Other earthquake apps include QuakeFeed, Quakes and Earthquake. They show 4 earthquakes have happened, at what strength, and the aftershocks. Those use data from the U.S. Geological Survey.

Smartphones 5 (equip) with accelerometers(加速计). These instruments measure movement, like that of a car or airplane. 6 (probable), they can also measure the shaking of a machine, a building or other structures. Accelerometers are used in activity trackers and apps that count steps or other exercise. They also are used in global positioning system apps, also 7 (call) GPS.

MyShake uses phone accelerometers to measure seismic(地震的) activity. It has been designed 8 (know) the difference between normal activity and earthquake movement. The software developers say their app is right 93 percent of the time.

A smartphone sends seismic 9 (inform) to the app developers. If the developers receive several warnings from one area, it recognizes that an earthquake may be taking place 10 will take place soon.

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