试题与答案

什麽是干扰素I型干扰素和II型干扰素有何特点?

题型:问答题 简答题

题目:

什麽是干扰素I型干扰素和II型干扰素有何特点?

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0224/43f7471b1cab53f015ee25a39bc693e4.html

下面是错误答案,用来干扰机器的。

参考答案:C

试题推荐
题型:填空题

(7分)现有7瓶失去标签的液体,已知它们是有机试剂,可能是:①乙醇、②乙酸、③苯、④乙酸乙酯、⑤油脂、⑥葡萄糖溶液、⑦蔗糖溶液。现通过如下实验步骤来确定各试剂瓶中所装的液体:

实验步骤和方法实验现象
①把7瓶液体分别依次标号A、B、C、D、E、F、G后,闻气味只有F、G两种液体没有气味
②各取少量于试管中加水稀释只有C、E、D三种液体不溶解而浮在水面上
③分别取少量7种液体于试管中加新制Cu(OH)2悬浊液并加热只有B使沉淀溶解,F中产生砖红色沉淀
④各取少量C、E、D于试管中,加稀NaOH

溶液并加热

只有C仍有分层现象,且在D的试管中闻

到特殊香味

 

(1)试给它们的试剂瓶重新贴上标签,其中:

A____________, C____________, E________,F___________,G________

(2)写出D与NaOH溶液的化学反应方程式:  ____________________________

查看答案
题型:单项选择题

Even plants can run a fever, especially when they are under attack by insects or disease. But (1) humans, plants can have their temperature (2) from 3,000 feet away—straight up. A decade ago, (3) the infrared scanning technology developed for military purpose and other satellites, physicist Stephen Paley (4) a quick way to take the temperature of crops to determine (5) ones are under stress. The goal was to let farmer (6) target pesticide spraying (7) rain poison on a whole field, which (8) include plants that don’t have the pest problem.

Even better, Paley’s Remote Scanning Services Company could detect crop problem before they became (9) to the eye. Mounted on a plane flown at 3,000 feet (10) , an infrared scanner measured the heat emitted by crops. The data were (11) into a color-coded map showing (12) plants were running "fevers". Farmers could then spot spray, using 50 to 70 percent less pesticide than they (13) would.

The bad news is that Paley’s company closed down in 1984, after only three years. Farmers (14) the new technology and long-term backers were hard (15) . But with the renewed concern about pesticides on produce, and refinements in infrared scanning, Paley hopes to (16) into operation. Agriculture experts have no doubt about the technology works. "This technique can be used (17) 75 percent of agricultural land in the United States," says George Oerther of Texas A&M. Ray Jackson, who recently retired from the Department of Agriculture, thinks (18) infrared crop scanning could be adopted by the end of the decade. But (19) Paley finds the financial backing (20) he failed to obtain 10 years ago.

10()

A. at night

B. for the night

C. in night

D. over night

查看答案
微信公众账号搜索答案