10. B　 句意理解题。根据本段内容可知答案。

　C

Charging your mobile phone might soon be as simple as taking a walk around the block.　 Scientists have created a new machine that harvests energy from the movement of the knees while walking. Six volunteers wore the devices(装置)on their legs while walking on a treadmill (跑步机) and were able to produce about five watts of electrical power each. That’s enough energy to run 10 mobiles at the same time.

“Since muscles are the powerhouses of the body, my colleagues and I designed our device to generate electricity from the move of the knee joint,” said Max Donelan. “It resembles a knee brace and weighs about 1.5 kilograms including the gearing (传动装置) and generator.”

The apparatus (装置) catches the energy of a person’s movement by connecting an electrical generator to knee moving. When the wearer extends the knee, a gear on the device turns and spins the generator, which builds up energy. When the knee is flexed, the device turns off so as not to tax the wearer. The machine senses moving and knows when to activate itself.

The design allows a person to use the tool without using much additional energy beyond the normal demands of walking. The researchers measured the volunteers’ oxygen intake and carbon-dioxide output to make sure it wasn’t strenuous to use.

People are an excellent source of portable power. An average-sized person stores as much energy in fat as a 1,000-kilogram battery. People recharge their body batteries with food.

The device could be used to power computers in remote areas where electricity is shot. The early markets are people whose lives depend on portable power, such as people with artificial limbs(肢体). On the military side, some soldiers have an extreme dependence on batteries these days, so both these groups could benefit.

9．D　 句意理解题。选项D与第三段第三句句意相同。

8．B　 信息查找题。通读第二段可知作者的电脑并没有指控她出错。注：rather than“是……而不是……”, 故选项B正确。

7．A　 句意理解题。第二段第一句中的took the machine for granted意思就thought it is natural。

6．C　 分析推理题。文章中第二段第一至第三句间接地解释了这句话的文中所指的意思。

10．How　do　you　understand　the underlined sentence　in　the　text? 　A.　It　is　always　ready　to　inform　me　when　I　am　ready　to　go. 　B.　It　is　always　ready　to　start　working　when　I　am　ready　for　work. 　C.　When　I　am　ready　to　go,　it　is　patient　to　wait. 　D.　When　I　am　ready　to　go,　it　has　already　gone.

[解题导语]

作者不会使用新买的电脑，向她侄儿求助。由此引出了作者对儿童比成年人容易接受新事物的一番议论。最后作者倡导成年人要积极地接受新事物。

[答案及简析]

9．According to the third paragraph, it is human nature that we resist those things which　　

A．only represent the comfortable and acceptable past

B．change thoroughly into the comfortable and acceptable past

C．make people stand still when all else is moving forward

D．change completely from the acceptable and comfortable past

8．Which of the following doesn’t the author’s computer do ?

A．It asks the author if she has made a mistake.

B．It accuses the author of making mistakes.

C．It corrects the author’s spelling mistakes.

D．It informs the author of her mistakes.

7．According to the second paragraph, which of the following statements is true?

A．The nephew thought it is natural to accept the fact that computers are now a way of life.

B．The nephew believed that machines were made for people to do whatever they wanted.

C．computers are not only used to communicate, but also to remove their limitations.

D．It is a fact that both adults and children have accepted computers as a way of life.

6．What is the new meaning of　 “So simple a child can do it” for the author?

A．computers are so easy to operate that even a child can play them well

B．A child can always do more complex things than an adult.

C．It is easier for a child to accept new things than for an adult.

D．A child has greater ability than an adult in operating computers.