何时采茧?

题型:问答题 简答题

问题:

何时采茧?

考点:畜牧、兽医科学蚕桑学蚕桑学题库
题型:问答题 简答题

生命质量的衡量标准不包括()

A.个体生命健康程度

B.个体生命德才素质

C.个体生命优化条件

D.个体生命治愈希望

E.个体生命预期寿命

题型:问答题 简答题

阅读理解。

     A Russian, a Cuban, an American businessman and an American lawyer were on a train traveling across

England. The Russian took out a large bottle of vodka, gave each of the men a drink and then threw the rest

half bottle of vodka out of the window. "Why did you do that?" asked the American businessman. "There's

too much vodka in my country," said the Russian, "And really we have more than we will ever use." A little

later, the Cuban passed around fine Havana Cigars. Then he threw his out of the window. "I thought Cuba

is not a rich country," the businessman said. "But you threw that very good cigars out of the window!"

"Cigars," the Cuban answered, "are the cheapest in my country. We have more of them than we know what

to do with." The American businessman sat quietly for a moment. Then he got up, caught the lawyer by the

arm and threw him of the window.

1. The people in the story are from _____ countries.

A. one

B. two

C. three

D. four

2. The four people are traveling by _____.

A. bus

B. air

C. train

D. sea

3. Vodka is a kind of _____.

A. treasure (珍宝)

B. wine

C. food

D. medicine

4. The Russian and the Cuban both wanted to _____.

A. tell the businessman that their countries are rich

B. prove (证明) that they were rich

C. ask the two Americans to visit their countries

D. make the businessman happy

5. What did the businessman want to say by throwing the lawyer out of the window?

A. I want to buy some vodka.

B. We have too many lawyers in my country.

C. I'll go to Cuba and do some business of cigars.

D. If you need lawyers, come to America.

题型:问答题 简答题

添枝加叶,让句子更生动、具体。

(1)灰雀在枝头歌唱,惹人喜爱。  

    灰雀在枝头                  歌唱,                 惹人喜爱。

(2)一个早晨,高尔基正在读书。  

    一个               早晨,高尔基正在            读书。

题型:问答题 简答题

有两根绳子,长的一段是42厘米,短的一段是24厘米,两根都截去相同的一段后,长的绳子的长度是短的绳子的长度的4倍,剪短后长的绳子是多少厘米?()

A.18

B.24

C.30

D.32

题型:问答题 简答题

阅读《深海潜水器》,完成问题。

深海潜水器

  ①潜水器大体上可分三种。一种是无人驾驶的自由行动的潜水器,也叫水下自动机器人。船开到某一海域,把它放下去,它可以自动地在深海探测。另一种是缆控潜水器,拖着一根长缆,放下水去,然后由甲板控制人员通过遥控机械手和电视进行取样、拍照、探测。再一种就是载人潜水器,可以携带海洋科学家进入海洋深处,在海底现场直接进行观察、分析、评估,实现高效作业。

  ②我国新开发的7000米载人潜水器,长8米,宽3米,高3.4米,是用特殊的钛合金材料制成的。从外观上看,潜水器呈一椭圆形球体,酷似一头小鲸鱼,能容纳3个人:一名操作员,两名科学家。在潜水器的前端,安装有一个密封的玻璃舷窗,透过它,潜水科学家可以看见外面的神秘世界。它有两个配重块和一个压水舱。当需要下潜时,压水舱注水,开始下潜。当需要在水中悬停时,它抛出一个配重块,如果此时启动动力装置,就可以工作了。当需要上浮时,它抛出第二个配重块,同时向压水舱加入空气,排出海水,就可以上浮。

  ③载人潜水器主要用于深海资源勘探、海底测绘采样、热液硫化物考察、深海生物基因采样、深海地质调查等领域。在过去的二十多年里,载人潜水器已经取得了众多的科研成果。1991年俄、美科学家两次乘坐和平号,在大西洋发现了迄今为止最大的热液矿体。1994年俄国科学家在大西洋水域热液场探测时,发现了多种热液生物,具有代表性的有虾类、贻贝类、鳗类等生物群。在深海地质研究方面,日本科学家在日本海沟6200米深的斜坡上发现了裂缝,同时还发现了一条地震断层悬崖。

  ④在军事上,载人潜水器可以直接为建设海底军事基地服务,还可以直接参与现代水雷战,完成潜艇救生和水下捞救等任务。

  ⑤在21世纪,加快发展深海载人潜水器,把我国建设成为新时代的海洋强国是中 * * 的一项伟大而艰巨的历史性任务。

1.结合第②段内容,从说明层次安排和语意表达的角度说出不把文中划线的句子放在这一段末尾的两条理由。

_______________________________________________________

2.阅读下面的两则链接材料,结合文章内容,分别写出你探究的结论。

【材料一】

  海洋地质专家估计,海底储存着约1350亿吨石油,近140万亿立方米的天然气,海底还沉积着极为丰富的多金属结核,其中铀的储藏量高达40亿吨,是陆地上的2000倍。

【材料二】

  21世纪,中国海洋安全环境不容乐观。国外一些有识之士曾多次提醒我们:“在中国海区,有70%以上的地区存在着危机!”中国国家863计划海洋领域首席科学家汪品先院士指出:深海基础研究是21世纪国际海洋竞争的重要部分。深海研究不只是人类了解地球亟待填补的空白,也是国家资源和安全保障之所系。

结论一:_______________________________________________

结论二;_______________________________________________

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