题目内容

【题目】下表为四个国家某一年的人口变动数据,回答下列各题。

国家

甲

乙

丙

丁

人口出生率(%)

2.9

2.6

2.4

1.3

人口死亡率(%)

2.3

1.2

1.0

1.1

人口增长率(%)

0.6

1.4

1.4

0.2

人口迁移率(%)

-0.2

-0.1

0.1

0.2

【1】根据表中数据判断,人口增长属于传统型的是( )

A. 甲 B. 乙 C. 丙 D. 丁

【2】四个国家中,人口增长最快的是( )

A. 甲 B. 乙 C. 丙 D. 丁

【3】四个国家中,最可能是发达国家的是( )

A. 甲 B. 乙 C. 丙 D. 丁

【答案】

【1】B

【2】C

【3】D

【解析】

【1】人口增长属于传统型的特征是高出生率、低死亡率、低高自然增长率,表中符合该特征的是乙国。

【2】丙国的人口增长特征是高出生率、低死亡率、高自然增长率,属于传统型,此时人口大量迁入,人口增长快,但无从知道人口总数和资然状况,也就不知道人均资源占有量。

【3】发达国家人口增长模式是现代型,其人口增长特征为低出生率、低死亡率、低自然增长率,表中符合该特征的是丁国。

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可以发出地震警报的应用程序

228

10分钟

★★★☆☆

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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