题目内容

【题目】城市发展到一定阶段,城市居民为了追求比较好的生活环境,由市中心区向郊区迁移。商业和制造业也随之向外扩散,出现逆城市化现象。完成下列问题。

【1】下列国家,逆城市化现象最明显的是

A.尼日利亚 B.中国 C.英国 D.越南

【2】逆城市化现象产生的主要原因是

A.郊区有更多的就业机会

B.市区环境恶化

C.市区人口稀疏

D.市区环境质量的改善

【3】城市化过程中,可能造成城市区域的

A.地下水位升高 B.气温降低

C.原生植被减少 D.地形起伏增大

【答案】

【1】C

【2】B

【3】C

【解析】

试题分析:

【1】由题中材料“城市发展到一定阶段,城市居民为了追求比较好的生活环境,由市中心区向郊区迁移。”可知逆城市化现象最明显的应该是城市化水平高地区。尼日利亚、中国、越南都是发展中国家,正在进行城市化。英国是发达国家,城市化水平很高,出现逆城市化现象。

【2】市区环境恶化,人们对环境质量的要求提高,乡村和小城镇的基础设施逐步完善,交通运输的通达性不断增强,城市的地价昂贵,房租高。这些是逆城市化原因。

【3】城市化过程中,造成城市区域的地下水位升高可能性很小、气温不仅不会降低,反而会升高(热岛效应);对原生植被破坏最大,使植被减少;地形起伏更不可能增大。

练习册系列答案
相关题目

【题目】阅读下列材料,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。

C

A new study provides the best evidence yet that wearing a back brace(背撑) will slow the progression of the most common form of scoliosis(背撑) in adolescents, helping them avoid painful spine(脊柱) operation.

Doctors have recommended bracing for more than 50 years, but until now, there was limited evidence that bracing and other conservative treatments relieved back pain or improved quality of life in patients.

“When you have teenagers who are anxious about wearing a brace to school or what their friends will think, it gave us a bit of heartache to try to convince them if we weren’t certain ourselves,” said Dr. Paul D. Sponseller at Johns Hopkins Children’s Center, who was not involved in the study. “In light of this new evidence, we can say we really do have a basis for putting them through bracing.”

In the study, researchers led by Dr. Stuart L. Weinstein at the University of Iowa analyzed data on 242 young patients. The children were all aged 10-15 and they all had a spinal curvature(脊柱弯曲) of 20-40 degrees.

The patients were divided into two groups. One group were used for observation(they did not use bracing) ; the other group were required to wear the brace for at least 18 hours daily

In the analysis that included both groups, the rate of treatment success was 72% among children with bracing, compared with 48% among those under observation. The benefit increased when the participants had longer bracing hours. More than 90% of the children who were successfully treated wore their braces more than 13 hours a day.

When her daughter Maddie was diagnosed with scoliosis at age 10, Becky Houser, of North Liberty, Iowa, wanted to avoid operations “at all costs.” So Maddie, a participant in Weinstein’s study, chose to wear a brace.

“We didn’t want to not do anything,” said Houser, who underwent an operation for scoliosis thirty years ago.

After three years of bracing, Maddie, now 13, was thrilled to learn that her spinal curvature was holding steady at 28 degrees. She no longer needs bracing because she has reached the age when children achieve bone maturity.

“We are extremely relieved,” Houser said.

【1】 In the past, when Sponseller recommended bracing he .

A. tried to improve the treatment

B. was unsure about its effectiveness

C. was worried about patients’ life quality

D. considered other people’s opinions first

【2】 Most participants using the brace found .

A. it was a successful treatment

B. long bracing hours were harmful

C. it had both advantages and disadvantages

D. those under observation recovered mush faster

【3】What was Houser’s attitude towards the spine operation?

A. She was uncertain about it.

B. She was hopeful of it.

C. She disapproved of it.

D. She tolerated it.

【4】 Why was Houser’s family extremely relieved?

A. Houser was successful treated.

B. Maddie’s scoliosis was under control.

C. The research was eventually completed.

D. Conservative treatments were finally accepted.

【5】 What is the passage mainly about?

A. The spinal curvature’s progression.

B. The most common form of scoliosis.

C. A detailed analysis of spine operation.

D. A new study on the effectiveness of bracing.

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网