大学英语六级改革适用（阅读）模拟题2019年(1)
(总分710,考试时间130分钟)
Part III Reading Comprehension
Section C
A blind baby is doubly handicapped. Not only is it unable to e, but becau it cannot receive the visual stimulus from its environment that a sighted child does, it is likely to be slow in intellectual development. Now the ten-month old son of Dr. and Mrs. Dennis Daughters is the subject of an unusual psychological experiment designed to prevent a lag in the learning process. With the aid of a sonar-type electronic device that he wears on his head, infant Dennis is learning to identify the people and objects in the world around him by means of echoes.
The device is a refinement of the "Sonicguide", an instrument produced by Telensory Systems, Inc., of Palo Alto, Calif., and ud by blind adults in addition to a sane or guide do
g. As adapted for Dennis, it consists of a battery-powered system about the size of a half dollar that is on a headgear. A transmitter emits an ultrasonic pul that creates an 80 degree cone of sound at 6 feet. Echoes from objects within the cone are perceived as sounds that vary in pitch and volume with the size and distance of the object. The clor an object is, the lower the pitch, and the larger the object, the louder the signal. Hard surfaces produce a sharp ping, while soft ones nd back signals with a slightly fuzzy quality. An object slightly to the right of Dennis nds back a louder sound to his right ear than to the left. Thus, by simply moving his head right and left and up and down, he can not only locate an object but also get some notion of海参吃法
its shape and size, thanks to the varying qualities of sounds reaching his ears as the cone of ultrasound pass its edges. Dennis likes to u the device to play a kind of peek-a-boo with his mother. Standing on her knee and facing her directly, he receives a strong signal in both ears. By turning his head away, he makes her em to disappear. From the first time he wore it," says Mrs. Daughters, "it was like a light going on in his head."
What remains to be determined is how well the device will help Dennis cope with his s
urroundings as he begins to walk and venture further into his environment. Meanwhile, Telensory, Inc. is working on the development of sonar device with somewhat the same nsitivity as Dennis's for u by school-age children.
1. The rearch involving infant Dennis is directed to _____.
A. helping the blind to e and learn as well as others
B. facilitating the learning process of blind children
C. solving blind children's psychological problems
D. finding out how children develop intellectually
2. Infant Dennis becomes the subject of the experiment most probably becau _____.
A. he already lags behind the sighted children
B. he leads a life as normal as any other children
C. he is at the early stage of the learning process
D. he has the aid of a sonar-type electronic device
3. What can we learn about infant Dennis' device?
A. Its prototype was designed for blind adults.
B. Its battery is as small as a half-dollar coin.
C. It is functionally similar to a sane and guide dog.
D. It has been improved by Telensory Systems, Inc.
4. "its edges"(Line 11, Para. 2)refers to_____.
A. the edge of an object
B. the edge of the device
C. the boundary of Dennis' movement
D. the boundary of the sound pitch
5. What is Telensory Systems, Inc. most likely to think about infant Dennis' device?
A. It had better be ud by blind children from school age.
B. It needs improving for u in a complicated environment
C. It may not be so suitable for the blin国防科技大学是军校吗
d adults.
D. It benefits blind children in terms of learning.
Frustrated with delays in Sacramento, Bay Area officials said Thursday they planned to take matters into their own hands to regulate the region's growing pile of electronic trash.
A San Jo councilwoman and a San Francisco supervisor said they would propo local initiatives aimed at controlling electronic waste if the California law-making body fails to act on two bills stalled in the Asmbly. They are among a growing number of California cities and counties that have expresd the same intention.
Environmentalists and local governments are increasingly concerned about the toxic hazard pod by old electronic devices and the cost of safely recycling tho products. An estimated 6 million televisions **puters are stocked in California homes, and an additional 6,000 to 7,000 computers become outdated every day. The machines contain high levels of lead and other hazardous substances, and are already banned from California Landfills(垃圾填埋场).
Legislation by Senator Byron Sher would require consumers to pay a recycling fee of up to $30 on every new machine containing a cathode(阴极)ray tube. Ud in almost all video monitors and televisions, tho devices contain four to eight pounds of lead each. The fees would go toward tting up recycling programs, providing grants to non-profit agencies that reu the tubes and rewarding manufacturers that encourage recycling.
A parate bill by Los Angeles-area Senator Gloria Romero would require high-tech manufacturers to develop programs to recycle so-called e-waste.
If pasd, the measures would put California at the forefront of national efforts to mana
ge the refu of the electronic age.
But high-tech groups, including the Silicon Valley Manufacturing Group and the American Electronics Association, oppo the measures, arguing that fees of up t皮肤病的治疗
o $30 will drive consumers to online, out-of-state retailers.
"What really needs to occur is consumer education. Most consumers are unaware they're not suppod to **puters in the trash," said Roxanne Gould, vice president of government relations for the electronics association.
Computer recycling should be a local effort and part of residential waste collection programs, she added.
