Passage 2
Flying over a desert area in an airplane, two scientists looked down with trained eyes at trees and bushes. After an hours 11 one of the scientists wrote in his book, Look here for 12 metal. Scientists in another airplane, flying over a mountain region, sent a 13 to other scientists on the ground, Gold possible. Walking across hilly ground, four scientists reported, This ground should be searched for metals. From an airplane over a hilly wasteland a scientist sent back by radio one word, Uranium.
None of the scientists had X-ray eyes: they had no 14 powers for looking down below the earths surface. They were 15 putting to use one of the newest methods of 16 minerals in the ground using trees and plants as 17 that certain minerals may lie beneath the ground on which the trees and
plants are growing.
This newest method of searching for minerals is 18 on the fact that minerals deep in the earth may 19 the kind of bushes and trees that grow on the surface.
At Watson Bar Creek, a brook six thousand feet high in the mountains of British Columbia, Canada, a mineral search group gathered bags of tree seeds. Boxes were filled with small branches from the trees. Roots were dug and put into boxes. Each bag and box was 20 marked. In a scientific laboratory the parts of the forest trees were burned to ashes and tested. Each small part was examined to learn whether there were minerals in it.
A. signs B. sufficiently C. locating D. affect
E. merely F. magic G. hints H. carefully
I. finding J. message K. flight L. probable
M. revealing N. based O. information
太阳黑子消失 地球或迎小冰期
英女王将加薪 八一八王室成员薪水
荐片:七月你不能错过的最新影片
你每天应该吃芒果的4个理由
吃什么最健康 专家和你想的不一样
增加压力的四种食物
人在囧途:旅游者自爆旅行中的最糗的事
我曾是一个不友好的人
国内英语资讯:National Day reception held for overseas Chinese, compatriots of HK, Macao, Taiwan, returned
体坛英语资讯:Serbia coach doubts huge disparity beneficial for FIBA World Cup
如何让英语口音更地道?
写作后不能忽略的事:快速查找错误
网评不做键盘侠,12个问题先自答
国内英语资讯:China holds art performance to celebrate 70th founding anniversary of PRC
从改变生活方式做起 有7成几率可预防癌症
体坛英语资讯:Sports Focus: Live streaming tech shines at FIBA World Cup
国内英语资讯:Xi Focus: Xi confers highest state honors on individuals ahead of National Day
任天堂的Switch Lite正式发布
脱欧后 要和英国洽谈合作的国家已排起了长队
美国男子执念成魔,去了全球15,000家星巴克,终于喝恶心了
Facebook女员工不得穿“让人分心”的衣服
改变生活的小习惯
早晨节约时间的九个简单小妙招
开卷考依然一脸懵逼,窍门在这里!
里约奥运会拟发放45万个避孕套 超伦敦3倍
国际英语资讯:Thousands join fun races in Athens to help raise awareness of breast cancer
眼睛疲劳不用烦,8个方法助舒缓
国际英语资讯:Saudi-led coalition announces falling of Houthi missile in Yemen
国内英语资讯:Experts say Xis speech at awards ceremony to inspire Chinese people, international friends
日本招人有新招 不靠面试笔试靠打麻将
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |