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During the recent economic down turn, South American countries have almost lost all their
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Section B
Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice.
Examinations have a longer history in China than in any other country, yet it is today an issue around in which controversy flourishes. At each stage of their school lives children are faced with exams: exams to enter junior middle school, senior middle school, vocational school, colleges and universities. As a result of having constantly to think of these hurdles facing them children find themselves under constant pressure, unable to take time off from studying exam-oriented subjects to relax with friends or to develop other interests. Within school the concentration on exam success leads to the neglect of courses which are not central to the examinations and a method of teaching and learning which emphasizes training the ability to do well in tests but neglects developing the ability to think creatively.
Despite such criticisms the examination system still has its defenders. Without it, they argue, how can we test students' abilities and evaluate the effectiveness of teachers and schools？ They believe that they provide the only objective way of selecting students and reduce the exercise of unfair back-door practices to gain advantage for children on the basis of influence or corruption. Examinations are also felt to offer the impetus to students to master their subject in a way in which they otherwise might not. "While too much anxiety can be a bad thing, a little anxiety can stimulate students to learn better than if left without any test to pass," says Li Jie, a leading advocate of the value of testing. "I can remember things now which give me great pleasure which I doubt I would have learned at the time if I had not had to do so for the examinations."
Which of the following statements about examinations in China is correct？
Despite a recent drop of about 10% in many stock markets, the world economy is still experiencing gains.
A．He dislikes his present job.B．He wants a higher salary.C．He wants to have more diver
RTCA, an organization which advises the aviation(航空) industry, has recommended that all airlines ban(禁止) such devices from being used during "critical" stages of flight, particularly take-off and landing. Some experts have gone further, calling for a total ban during all flights. Currently, rules on using these devices are left up to individual airlines. And although some airlines prohibit passengers from using such equipment during take-off and landing, most are reluctant to enforce a total ban, given that many passengers want to work during flights.
The difficulty is predicting how electromagnetic fields might affect an aircraft's computers. Experts know that portable devices emit radiation which affects those wavelengths which aircraft use for navigation and communication. But, because they have not been able to reproduce these effects in a laboratory, they have no way of knowing whether the interference might be dangerous or not.
The fact that aircraft may be vulnerable(易受损的) to interference raises the risk that terrorists may use radio system in order to damage navigation equipment. As worrying, though, is the passenger who can't hear the instructions to turn off his radio because the music's too loud.
The passage is mainly about______.
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