题目内容

【题目】太阳能量来源于( )

A.氢原子核的裂变反应B.氦原子核的裂变反应

C.氢原子核的聚变反应D.放射性元素的衰变

【答案】C

【解析】

氢原子核的核聚变而不是核裂变反应,故A项错误;是氢原子核而不是氦原子核的核聚变反应,故B项错误;是氢原子核的核聚变反应,故C项正确;与放射性元素的衰变没有关系,故D项错误。故选C。

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【题目】Often people use laptops (笔记本电脑) on trains and airplanes,in airports and hotels.These laptops connect people to their workplace.In the United States today,laptops also connect students to their classrooms.

Westlake College in Virginia will start a laptop computer programme that allows students to do schoolwork anywhere they want.Within five years,each of the 1,500 students at the college will receive a laptop.The laptops are part of a $10 million computer programme at Westlake,a 110yearold college.The students with laptops will also have access to the Internet.Besides,they will be able to use email to“speak”with their teachers,their classmates,and their families.However,the most important part of the laptop programme is that students will be able to use computers without going to computer labs.They can work with it at home,in a fastfood restaurant or under the trees—anywhere at all!

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A. do their school work

B. have access to the Internet

C. send emails

D. connect them to libraries

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A. talk with speakers

B. talk with one's mouth

C. communicate

D. use the computer language

3Which of the following is TRUE about Westlake College?

A. It is an old college in America.

B. 1,500 students have laptops.

C. All students use computers.

D. Students there can do everything.

【题目】分析珠江三角洲经济区产业发展特点与条件的有关图文材料,并回答问题。

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