题目内容
【程序说明】从键盘输入学生的学号，在“成绩”表中计算该生的平均成绩，并说明成绩的档次(优、良、中、及格和不及格)，如果该生不在表中则提示相应的信息。
【程序】
SET TALK OFF
CLEAR
USE 成绩
ACCEPT“请输入学生的学号：” TO XH
(1)
IF (2)
？“查无此人!”
ELSE
(3) 成绩TO CJ FOR 学号＝XH
DO CASE
CASE CJ＞=90
DC=“优”
CASE CJ＞＝80
DC＝“良”
CASE CJ＞＝70
DC=“中”
CASE CJ＞＝60
DC＝“及格”
(4)
DC＝“不及格”
ENDCASE
？ XH，CJ，DC
ENDIF
USE
SET TALK ON
(1)
查看答案
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SECTION B PASSAGES
Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
听力原文： The British Broadcasting Corporation is rejecting more and more candidates applying for jobs, because they suffer from hearing loss. And this is due to a wide use of personal stereo systems, According to officials at the corporation, about three per cent of them fail to win jobs for this reason. The figure indicates that people suffering from hearing defects are more common than a decade ago.
Candidates applying for jobs at the British Broadcasting Corporation have always had hearing tests, but the techniques for such tests were not standardized until five years ago. The 'corporation says officially that there is no proof to link personal stereos with hearing disabilities, but frequent exposure to high level of sounds can diminish a person's understanding of speech. That will rule out his chances of being an engineer taking care of sound quality in recording.
So experts are now calling for manufacturers of personal stereos to provide a warning light. It flashes when the sound is too loud. One British manufacturer accepted this suggestion. And this manufacturer has made a device that switches itself off when the level of sound is too high. This device is of great significance and the situation changes a lot ever since.
What is the possible mason for the candidates fail to get jobs at the BBC？
听力原文： Water supplies to many Sudanese refugees in eastern Chad arc being cut because wells are drying up and it's still 6 weeks before rain is expected. Around 200,000 Sudanese are in the area, having fled the fighting in Darfur.
The camps strung out along the Chad-Sudan border arc very hot at this time of the year. A spokesman says
they can now only provide a third of the internationally recognized standard of water supply. That's just 5 liters a day for cooking, drinking and washing. Oxfam is conducting an urgent search for alternative supplies.
Water supplies are cut ______.
听力原文： Today, air travel is far safer than driving a car on a busy motorway. But there's a danger that grows every year.
From the moment an airplane takes off to the moment it lands, every moment is watched on radar screens. Air traffic controllers tell the pilot exactly when to turn, when to climb and when to come down. The air traffic controllers around a busy airport may handle 1,000 planes a day. Any plane that flies near the airport comes under the orders of the controllers there. Even a small mistake on their part could cause a disaster.
Recently such a disaster almost happened. Two large jets were flying towards the airport. One was carrying 69 passengers and came from Sydney. The other was carrying 156 passengers from New York. An air traffic controller noticed on his radar screen that the two planes were too close to each other. He ordered one to turn to the right and to climb. But he made a mistake. He ordered the wrong plane to do this. So, instead of turning away from the second plane, the first plane turned towards it. Fifteen seconds later it flew directly in front of the second plane. They avoided each other by the smallest part of a second. The distance between them was less than that of a large swimming pool.
Which factor can be the most potential danger for the airplane？
期货交易结算所实行的无负债每日结算制度也叫做逐日盯市制度。 ()
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