题目内容

The cost of living in Chengdu is among the lowest in China, ________ the quality of life is probably one of the highest.

A. while

B. when

C. as

D. since

A 【解析】句意:成都的生活费用是中国最低的,而生活质量可能是最高的。考查连词辨析题。while与…同时,强调主句和从句相反;when当时候,用于主句和从句动作有先后顺序时;as当……的时候,强调主句动作随从句动作而变化;since自从,后接时间段或从句,表示一段时间,用于现在完成时态。根据句意语境,可知两句意思相反,故选A。
练习册系列答案
相关题目

Workers aren't allowed to go into a big underground computer center until they step up to a machine that takes a quick picture of the tiny blood vessels (血管) inside their eyes.

If the machine can't __________ the picture with images in its computer, the worker is stopped by security guards (保安员).

Each person has his own way of blood vessels in his or her __________.And unlike a key, the way can't be __________.Old-fashioned keys and locks may soon be things of the past.High-tech security devices (安全装置) are being fixed at military (军事的) bases, computer centers and banks.Companies that __________ the machines say they'll someday be used in people's homes and cars.

Already, a Japanese company has fixed ways that recognize (识别) people's fingerprints in 360 new homes.The machines open the doors only for the __________ of the houses.The new security ways are selling well because thieves and robbers are getting better at breaking into buildings and computers that are __________ by keys and locks.Since nobody can steal or copy a fingerprint, or one's eyes, the new machines are __________.

Other new machines recognize one's voice.Two American companies use __________ machines to keep an eye on their computers.Inexpensive voice-recognition machines may someday take the place of locks on cars.The doors would open only for the owners.The machines would __________ the owners as little as $270.Although the up-to-date machines are amazing, scientists must still solve a serious problem.How will a boy borrow his dad's car

without borrowing his dad's __________?

1.A. match B. fit C. compare D. share

2.A. face B. eyes C. voice D. fingerprints

3.A. borrowed B. missed C. stolen D. bought

4.A. make B. buy C. have D. copy

5.A. makers B. buyers C. sellers D. owners

6.A. connected B. collected C. prevented D. protected

7.A. safe B. unusual C. helpful D. useful

8.A. fingerprints B. voice-recognition C. locks D. eye-recognition

9.A. pay B. spend C. take D. cost

10.A. face B. voice C. fingers D. photo

1.A 2.B 3.C 4.A 5.D 6.D 7.A 8.B 9.D 10.B 【解析】试题分析:这是一篇科普文,介绍了三种安全防御系统:眼睛识别器、指纹识别器和语音识别器。 1.句意:如果机器不能与图片中的图像相匹配,工人就被保安拦住。考查动词辨析题。A. match使相配/相称;B. fit适合;C. compare比较;D....

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网