问题 选择题

“三效催化转换器”可将汽车尾气中有毒气体处理为无毒气体,下图为该反应前后分子种类变化的微观示意图,其中不同的球代表不同种原子.下列说法中,不正确的是(  )

A.分子在化学变化中可分

B.此反应一定有单质生成

C.原子在化学变化中不可分

D.参加反应的两种分子的个数比为1:1

答案

答案:D

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阅读理解

阅读理解。

    Electronic monitoring devices, mobile phone detectors and giant screens connected to

close-circuit TV cameras. Does it sound like a high security operation? Well, the National

College Entrance Examination (NCEE) in China is nothing less than that.

    The education authorities' efforts to prevent cheating at the exam have gone almost

unnoticed. The authorities launched the country's new monitoring system for the all-

important exam yesterday. The system is based on local schools' networks and is connected

to provincial headquarters, especially set up for the exam. The government has plans to

cover all the 31 provinces and regions in the next three years and offer the services for

other national exams, too.

    The records of students caught cheating during national tests, such as the college

entrance exam, would be stored in the system and made available online for higher

educational institutions' and future employers' reference.

    But despite all these measures, cheating remains a big temptation for some candidates.

The number of students caught cheating in last year's NCEE was 3,000, up from 1,300 in

2005. But this is hardly surprising because passing the NCEE is the only way most of the

students can get access to higher education.

    10.1 million students registered for this year's NCEE, 9.6 million taking the exam,

but only 5.67 million would enter college. Among the successful candidates will be about

500,000 with special merits who will be admitted to universities directly, which means

roughly 13 in every 24 candidates can actually enter college. That should explain why

some students are tempted to cheat during the exam.

    Cheating in such a well-monitored exam is not an easy thing to do, says an MOE

official, and it's very risky business too. The chance of a student getting away with

cheating is minuscule. And if caught, he/she risks ruining his/her entire career because

higher educational institutions and potential employers can always check his/her record.

1. The passage is most probably taken from _____. [ ]

A. a politics textbook.

B. a fashion report.

C. a reference book.

D. a newspaper.

2. According to the passage, what will happen if a student is caught cheating in the NCEE? [ ]

A. He/She will lose the chance to sit for more exams.

B. His/Her behavior will be recorded, stored and made available online.

C. He/She will get no records and lose the opportunity to go to college.

D. He/She will be blamed and his/her career and life will be put an end to.

3. The underlined word"minuscule" in the last paragraph probably means _____. [ ]

A. tiny

B. impossible

C. difficult

D. incredible

4. We can draw a conclusion from the passage that _____. [ ]

A. the education authorities are making great efforts to prevent cheating in exams

B. although it is very hard to succeed, many students take a chance to cheat in exams

C. honesty is still the best policy when it comes to exams

D. it is not easy to get access to higher education in China