皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【单选题】
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. Even plants can run a fever, especially when they're under attack by insects or disease. But unlike humans, plants can have their temperature taken from 3,000 feet away-straight up. A decade ago, adapting the infrared (红外线的) scanning technology developed for military purposes and other satellites, physicist Stephen Paley came up with a quick way to take the temperature of crops to determine which ones are under stress. The goal was to let farmers precisely target pesticide (杀虫剂) spraying rather than rain poison on a whole field, which invariably includes plants that don't have pest(害虫)problems. Even better, Paley's Remote Scanning Services Company cold detect crop problems before they became visible to the eye. Mounted on a plane flown at 3,000 feet at night, an infra-red scanner measured the heat emitted by crops. The data were transformed into a color-coded map showing where plants were running 'fevers'. Farmers could then spot-spray, using 50 to 70 percent less pesticide than they otherwise would. The bad news is that Paley's company closed down in 1984, after only three years. Farmers resisted the new technology and long-term backers were hard to find. But with the renewed concern about pesticides on produce, and refinements in infra-red scanning, Paley hopes to get back into operation. Agriculture experts have no doubt the technology works. 'This technique can be used on 75 percent of agricultural land in the United States,' says George Other of Texas A&M. Ray Jackson, who recently retired from the Department of Agriculture, thinks remote infra-red crop scanning could be adopted by the end of the decade. But only if Paley finds the financial backing which he failed to obtain 10 years ago. Plants will emit an increased amount of heat when they are ______.
A.
sprayed with pesticides
B.
facing an infra-red scanner
C.
in poor physical conditions
D.
exposed to excessive sun rays
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】以下方法属于生物检定法的是
A.
滴定分析法
B.
UV-Vis(紫外可见分光光度法)
C.
HPLC(高效液相色谱法)
D.
CE(毛细管电泳)
E.
无菌检查法
【多选题】中医养生的原则包括
A.
顺应自然
B.
养神为先
C.
养护正气
D.
避免邪气
E.
辨证论治
【多选题】中医养生的基本原则包括()
A.
起居作息养生
B.
协调脏腑
C.
节欲葆精
D.
辨证论治
E.
调息养气
【单选题】下列属于生物检定法的是( )
A.
色谱法
B.
光谱法
C.
微生物测定法
D.
电位法
【判断题】按住键盘.上的Alt键,然后按住鼠标中键进行移动即可移动视图.
A.
正确
B.
错误
【多选题】中医养生学的基本原则包括:
A.
预防为主,扶正祛邪
B.
动静互涵,形神合一
C.
审因施养,三因制宜
D.
五脏为本,杂合以养
【多选题】中医养生的基本原则包括
A.
协调脏腑
B.
畅通经络
C.
形神合一
D.
清净养神
E.
持之以恒
【多选题】中医养生学的基本原则包括:
A.
预防为主,扶正祛邪
B.
天人相应,与时俱进
C.
动静互涵,形神合一
D.
审因施养,三因制宜
E.
五脏为本,杂合以养
【多选题】中医养生学的基本原则包括:
A.
预防为主,扶正避邪
B.
动静互涵,形神合一
C.
审因施养,三因制宜
D.
五脏为本,杂合以养
【多选题】中医养生的基本原则包括
A.
预防为主,扶正避邪
B.
动静互涵,形神合一
C.
审因施养,三因制宜
D.
五脏为本,杂合以养
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题