问题 单项选择题 案例分析题

读“环流示意图”,完成题。

若此图为岩石圈物质循环示意图,a为岩浆,则下列说法正确的是()

A.b是变质岩

B.c一定是沉积岩

C.①一定是外力作用

D.④是重熔再生作用

答案

参考答案:D

解析:

若图示为地质循环,a为岩浆,则b一定为岩浆经历冷凝作用而生成的岩浆岩,A错误;则c、d可能为变质岩或沉积岩,而不能确定,④为生成岩浆的地质作用,一定为重熔再生作用,D项正确。

考点:本题考查大气环流、地质循环和读图综合分析能力。

点评:本题难度一般,考点较多,解题需要把握以下几点:①掌握热力环流的原因和与大气运动的关系;②能利用热力环流的空气垂直运动和水平运动进而确定气温、气压高低;③掌握三大类岩石和岩浆之间的相互转化关系和相应的地质作用,注意利用生成的物质来确定相应的地质作用。

选择题
阅读理解

阅读理解

     Nathan Phillips, who will formally begin his freshman year at the University of San Diego(USD) on

Aug. 31, will arrive on campus in an unusual and philanthropic manner.

     Phillips is expected to arrive between 5 p. m. and 6 p. m. Thursday on his bicycle, having pedaled

1,450 miles from Astoria, Ore.

    Phillips combined his desire to complete a long bike ride before entering college with his interest in

helping the children of Uganda.

     He is raising funds for Invisible Children, a San Diegobased organization seeking to end conflicts

afflicting(使苦恼) northern Uganda, the Democratic Republic of Congo and the Central African

Republic and stop the use of children as soldiers.

    Phillips had raised $1,540 before embarking Aug.11 and hopes to reach $2,000.

     Phillips, who is from Redmond, Washington, visited Uganda during high school and worked in an

orphanage(孤儿院) there. He was also inspired by a presentation by Invisible Children at his high

school.

    "I have been to Uganda and personally gotten to know some of the kids affected by the war," Phillips

said in a statement released by the university. "I would do anything to help these kids."

    Phillips' new roommate, Kyle Sharp, has joined him for the last 600 miles of the trip. Students and

other members of the USD community are expected to join him for the last 13 miles.

     "Nathan's passionate commitment(恪守承诺) to improving the lives of children more than 8,000

miles away resonates(共鸣) with USD's mission to prepare future leaders to change the world for the

better," Pamela Gray Payton, assistant vice president of public affairs at USD, said in a prepared

statement. "We are delighted to have Nathan as a member of our campus community."

     Supporters from USD and Invisible Children will greet Phillips and his entourage(随从) when they

arrive in front of Founders Hall on campus. The public is invited as well.

1. Which of the following statements about Nathan Phillips is TRUE?

A. Nathan Phillips has been a freshman at the university.

B. Nathan Phillips is an American.

C. Nathan Phillips is an African.

D. Nathan Phillips likes riding a bike.

2. Why does Nathan Phillips finish riding a bike for a long way before going into college?

A. He travels to Uganda.

B. He practises riding a bike.

C. He raises money to help the children of Uganda.

D. He wants to take exercise.

3. How much money does Nathan Phillips expect to collect in total?

A. $1,540.  

B. $2,000.  

C. $3,540.  

D. $2,540.

4. How far does Nathan Phillips ride to college?

A. 8,000 miles.  

B. 600 miles.

C. 13 miles.  

D. 86,000 miles.

5. What can we learn from the last paragraph?

A. People like Nathan Phillips.

B. The public invite Nathan Phillips.

C. People support what Nathan Phillips does.

D. Supporters like Nathan Phillips.