题目内容

(   ) 1. All human beings have a comfortable zone regulating the      they keep from

someone they talk with.

A. distance    B. division C. range    D. boundary

1. A考查名词词义辨析。distance距离;division 分割，划分；range范围;boundary界限，边界。the distance为先行词，keep distance from与.. 保持 距离。句意：当与别人谈话时，每个人都有限定与人相隔距离的舒适区。

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Most people know Alexander Graham Bell invented the telephone. But not many know about another talking device (equipment) he invented just four years later，in 1880. He called the device the photophone.

"Photophone" comes form the Greek words for "light" and "sound". The photophone did not use electricity to carry sound over wires between two people. That' s what a telephone does. Instead,

the photophone used a beam of sunlight traveling through the air. With his invention, Bell could actually transmit(传递)human speech on a beam of light. To do so，he spoke close to a thin mirror that was reflecting sunlight. The vibrations(颤动)of his voice caused the mirror to vibrate，and the vibrating mirror caused the light to vibrate. The vibrating light hit a light-sensitive cell in a receiver placed some distance away. The cell changed the light patterns into electrical signals. Earphones changed the signals back into sounds.

Bell believed that his idea of talking on a beam of light would prove to be important. He often called the photophone his greatest invention. Even though the photophone depended on a source of energy that was not constant一the sun―Bell wasn' t a bit discouraged. He felt sure that people would one day talk using beams of light.

Two much more recent developments made Bell' s dream come true. In 1960 ，a scientist built the laser. A laser produces a highly concentrated beam of light. Shortly afterward, other scientists developed a new kind of optical fiber. The optical fiber is a glass thread. The new fiber could carry light beams long distances―as far as several miles.

(   ) 1. According to Bell's own opinion,        is his greatest invention.

A. telephone    B. optical fiber C. photophone    D. laser

(   ) 2. What does "That" refer to in the underlined sentence?

A.  Using a beam of sunlight traveling through the air.

B.  Using electricity to carry sound over wires between two people.

C.  Transmitting human speech on a beam of light.

D.  Light and sound.

(   ) 3. Which statement is true about Bell，s invention of photophone?

A.   The photophone depends on a constant source of energy.

B.   The photophone is based on the invention of the telephone.

C.   Earphones are used to change light into sounds.

D.   The laser and the optical fiber are helpful for Bell' s invention.

7. The innocent boy took the advice that he                 strangers. ( stare )

这位单纯的男孩接受了不要盯着陌生人看的建议。

1. It was James Watt，s observation of steam from a kettle           the idea of the steam engine. ( birth)

James Watt观察到从茶壶飘出的蒸汽，这让他产生了蒸汽机的想法。

8. Hadn't I stayed up too late last night, I            my flight today. (miss )

如果我昨天不熬得太晚的话，我就不会错过今天的航班了。

(   ) 6. It was just that casual glimpse that made him        Cynthia,whom he had been

cherishing for a life time.

A. make up of    B. take the place of C. catch sight of    D. run out of

3.        ，the firefighters managed to rescue the little boy from the big fire, (as )

尽管很困难，消防员还是成功地将小男孩从大火中解救了出来。

7. While I agree with most of what you said,I don't agree with your viewpoint                . (failure )

虽然我大体同意你说的内容，但我不同意你认为这个实验失败了的观点。

8.        the success of Xiong Chaozhong，the new golden belt receiver of WBC，more Chinese boys are making up their minds to devote them?selves to the game of boxing. (inspire )

在新的世界拳击协会金腰带获得者熊朝忠成功事迹的鼓舞下，更多的中国男孩决心投身于拳击运动。

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