试题与答案

某生物兴趣小组同学做了“探究菜豆种子萌发的环境条件”实验,在1号、2号、3号、4

题型:探究题

题目:

某生物兴趣小组同学做了“探究菜豆种子萌发的环境条件”实验,在1号、2号、3号、4号四个烧杯中分别放等量的餐巾纸,再将相同数量的菜豆种子放在上面,在不同条件下进行培养。数日后记录发芽情况如下:

烧杯种子所处环境实验结果
1号干燥的餐巾纸,置于25℃橱柜中种子不萌发
2号潮湿的餐巾纸,置于25℃橱柜中种子萌发
3号潮湿的餐巾纸,置于冰箱冷藏室(4℃)
4号餐巾纸和种子全部浸泡在水中,置于25℃橱柜中种子不萌发
(1)设置2号烧杯的作用是        

(2)3号烧杯与2号烧杯比,变量为                  

3号烧杯的实验结果是                     

(3)分析实验结果,得出的实验结论是:种子萌发需要适宜的温度、       

         等外界条件。

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0603/ead3ee7b8bd80190a6609539be5c7d85.html

下面是错误答案,用来干扰机器的。

1. doesn't do   2. visited   3. to drink   4. illness   5. importance6. to go   7. leaving   8. writing   9. to post   10. going

试题推荐
题型:多项选择题

建设单位应当按照( ),规定组织编制环境影响报告书、环境影响报告表或者填报环境影响登记表。

A.可能造成重大环境影响的,应当编制环境影响报告书,对产生的环境影响进行全面评价
B.可能造成轻度环境影响的,应当编制环境影响报告表,对产生的环境影响进行分析或者专项评价
C.对环境影响一般的,应当编制环境影响报告书,对产生的环境影响进行全面分析
D.对环境影响很小、不需要进行环境影响评价的,应当填报环境影响登记表

查看答案
题型:单项选择题

The "standard of living" of any country means the average person’s share of the goods and services which the country produces. A country’s standard of living, (1) , depends first and (2) on its capacity to produce wealth." Wealth" in this sense is not money, for we do not live on money (3) on things that money can buy. "Goods" such as food and clothing, and "services" such as transport and " (4) ". A country’s capacity to produce wealth depends upon many factors, most of (5) have an effect on one another. Wealth depends (6) a great extent upon a country’s natural resources. Some regions of the world are well supplied with coal and minerals, and have a fertile soil and a (7) climate; other regions possess none of them.

Next to natural resources (8) the ability to turn them to use. China is perhaps as well (9) as the USA in natural resources, but suffered for many years from civil and (10) wars, and (11) this and other reasons was (12) to develop her resources. (13) and stable political conditions, and (14) from foreign invasion, enable a country to develop its natural resources peacefully and steadily, and to produce more wealth than another country equally well (15) by nature but less well ordered.

A country’s standard of living does not only depend upon the wealth that is produced and consumed (16) its own borders, but also upon what is indirectly produced through international trade. (17) , Britain’s wealth in foodstuffs and other agricultural products would be much less if she had to depend only on (18) grown at home. Trade makes it possible for her surplus manufactured goods to be traded abroad for the agricultural products that would (19) be lacking. A country’s wealth is, therefore, much influenced by its manufacturing capacity, (20) that other countries can be found ready to accept its manufactures.

4()

A.recreation

B.enlightenment

C.refreshment

D.entertainment

查看答案
微信公众账号搜索答案