第25篇:
The government-run command post in Tunis is staffed around the clock by military personnel, meteorologists and civilians. On the wall are maps, crisscrossed with brightly colors arrows that painstakingly track the fearsome path of the enemy.
What kind of invader gives rise to such high-level monitoring? Not man, not beast, but the lowly desert locust. In recent months, billions of the 3-inch-long winged warriors have descended on Algeria, Libya, Morocco and Tunisia, blackening the sky and eating up crops and vegetation. The insect invasion, the worst in 30 years, is already creating great destruction in the Middle East and is now treating southern Europe. The current crisis began in late 1985 near the Red Sea. Unusually rainy weather moistened the sands of the Sudan, making them ideal breeding grounds for the locust, which lays its eggs in the earth. The insect onslaught threatens to create yet another African famine. Each locust can eat its weight in vegetation every 24 hours. A good-size swarm of 50 billion insects eats up 100,000 tons of grass, trees and crops in a single night.
All ﹩150 million may be needed this year. The U.S. has provided two spraying planes and about 50,000 gal. of pesticide. The European Community has donated ﹩3.8 million in aid and the Soviet Union, Canada, Japan and China have provided chemical-spraying aircraft to help wipe out the pests. But relief efforts are hampered by the relative mildness of approved pesticides, which quickly lose their deadly punch and require frequent replications. The most effective locust killer dieldrin has been linked to cancer and is banned by many Western countries and some of the affected African nations. More then 5 million acres have been dusted with locust-killing chemicals; another 5 million will be treated by the end of June.
On May 30, representatives of Tunisia, Algeria, Libya, Morocco and Mauritania will meet in Algiers to discuss tactics to wipe out the ravenous swarms. The move is an important step, but whatever plan is devised, the locust plague promised to get worse before the insects can be brought under control.
1.The main idea of the first sentence in the passage is that ___.
A.the command post is stationed with people all the time.
B.the command post is crowed with people all the time.
C.there are clocks around the command post.
D.the clock in the command post is taken care of by the staff.
2.The favorable breeding ground for the locust is ___.
A.rich soil.
B.wet land
C.paces covered crops and vegetation
D.the Red Sea
3.People are alert at the threat of the locust because ___.
A.the insects are likely to create another African famine.
B.the insects may blacked the sky.
C.the number of the insects increases drastically.
D.the insects are gathering and moving in great speed.
4.Which of the following is true?
A.Once the pesticides are used, locust will die immediately.
B.Relief efforts are proved most fruitful due to the effectiveness of certain pesticides.
C.Dieldrin, the most effective locust killer, has been widely accepted in many countries.
D.Over 10 million acres of affected area will have been treated with locust-killing chemicals by the end of June.
5.The purpose for affected nations to meet in Algiers on May 30 is ___.
A.to devise antilocust plans.
B.to wipe out the swarms in two years.
C.to call out for additional financial aid from other nations.
D.to bring the insects under control before the plague gets worse.
第二十五篇答案:BBADA
牛津小学英语五年级说课稿 Unit 2 Lesson 10
Holidays说课稿
小升初英语高手Yelena:学习英语四要点
小学英语教学设计的原理
Unit 3 Lesson 16说课稿
牛津小学英语六年级说课稿 Unit 4 Lesson 19
一年级英语下册《Chapter9 We like dolls》教学设计
牛津小学英语6A The National Day holiday说课稿
Pep小学英语六年级下册第一单元说课稿
小学英语教学 字母发音教学方法
第一单元Lesson1 说课稿
Unit 6 Holiday说课材料
人教版小学英语五年级说课稿 Lesson1
Unit 6,Go for it!说课稿
小学英语学习兴趣的培养
名师教授区分小学英语单词小窍门
英语复习容易犯的错误及应对方法
Unit5 Tasting说课
seasons ( Part A ) 说课稿
广州版小学英语六年级说课稿 Holidays
Unit 1 How Tall Are You?说课
牛津小学英语六年级说课稿 The National Day holiday
Unit 8, Go for it
英语教师的小学英语说课稿
广州版小学英语六年级说课稿 Where Is My Ruler
第六单元 doing housework 说课稿
人教版小学英语五年级说课稿 Unit4 第三课时A Read
说课稿(Unit 8, Go for it !)
三一口语三级备考必备:谈论天气用语小结
英语教学 浅谈小学英语阅读
| 不限 |
| 英语教案 |
| 英语课件 |
| 英语试题 |
| 不限 |
| 不限 |
| 上册 |
| 下册 |
| 不限 |