问题 问答题

  为庆祝中华人民共和国成立60周年,我班将出一期主题为展示60年来祖国建设取得的各项成绩、展现我国人民的精神风貌、激发学生们的爱国热情的黑板报,请你参与完成以下工作。

(1)同学们搜集了三则材料,预备从其中选两则放在同一个栏目中,你认为应该选哪两则?为什么?请你再结合自己所选两则材料的内容,用两个四字词语(或短语)为这个栏日拟个合适的名称。     

【材料一】  50年代末至60年代初,因为自然灾害等原因,连续三年粮食产量大幅庋减产,国民经济极度困难,同时苏联的单方面毁约,给中国带来巨大的经济损失。面对困境,我国科技人员不靠外援,自力更生,自主研制,终于在1964年研制成功中国第一颗原子弹。原子弹的成功爆炸,加强了我国的国防力量,也打破了关苏的核垄断。     

【材料二】  美国研制原子弹用了近18年的时间;中国仅用10年时间。、从第一颗原子弹爆炸到氢弹研制成功,美国用了7年零3个月,苏联用了4年,英国用了4年零7个月;中国只用了两年多时间!     

【材料三】  1965年,在各种条件极为艰苦的情况下,我国科学家在世界上首次破译牛胰岛素基因后,成功地人工合成了该胰岛素。诺贝尔奖金委员会 * * 蒂斯利尤斯对此评价说:“比核能力更有说服力的是胰岛素。因为,人们可以从书本中学到制造原子弹,但不能从书本上学习制造胰岛素……”     

答:选择第____________则和第_____________则材料

原因:___________________________________________________

栏目名称:______________________ 

(2)请你为本期黑板报写几句寄语,号召同学们“努力学习,报效祖国”。(用上“自强不息”“义不容辞”两个词语)(★★★)

寄语:____________________________________________________

答案

(1)

示例1:选一、三则材料,因为这两则材料的内容都是:我国科技领域克服困难、不靠外援,独立研究并取得辉煌成绩。   

栏目名称:自力更生(或自强不息),铸就辉煌。

示例2:选一、二则材料,因为这两则材料的内容是:在核武器研究中,我国科技人员克服困难、不靠外援,成功研制出核武器并且在速度上超过世界大国。  

栏目名称:自力更生(或自强不息),赶超大国   

(2)示例:60个春夏秋冬,祖国人民在各种困难面前顽强拼搏,自强不息,终于使我们的祖国屹立在世界之林,我们为祖国的辉煌成绩而骄傲!作为炎黄子孙,报效祖国是我们义不容辞的责任,我们会用我们的刻苦勤奋,创造奇迹,使祖国的明天更加光辉灿烂!

(意思对即可,答案不唯一) 

选择题
单项选择题

It sounds like a science fiction, but researchers say it’s a scientific fact: Microscopic organisms dubbed "killer algae" are paralyzing fish with unknown toxins and then eating away at their flesh. They might be making people sick, too.
The name given to this single-cell organism, or dinoflagellate, is Pfiesteria piscimorte- literally, "fish killer. " It was discovered at North Carolina State University in 1988, but at the same time, few scientists believed in its existence, much less in its highly unusual predatory nature. But ongoing research has led to international acknowledgment of the phenomenon and, recently, research funding.
Seemingly prompted by an unknown substance secreted by fish, the aggressive creature swims into action. It sends neurotoxins into the water and air, paralyzing a fish’s nervous system, and causing it to gasp for air at the surface. Eventually the fish suffocates. The killer dinoflagellate then attaches itself to the fish and begins sucking away at its flesh. This macabre scenario may help solve several sea mysteries, such as why fishermen report seeing "fish walks" (fish trying to leave the water) and pools of dead fish with holes eaten through them.
Whether humans are affected by the dinoflagellate’s toxin remains to be seen. Researchers think it’s unlikely eating fresh fish are in danger, but anyone with frequent exposure to the creature could be in peril. Several researchers working with the algae have reported bouts of memory loss and disorientation.
To understand the killer algae further, scientists must fully characterize their toxin and determine what stimulates them to attack. They also need to know if the algae are hurting fish populations, and whether pollutants make them more likely to attack.

All the following names are used to describe the organism EXCEPT ______.

A. dinoflagellate


B. Pfiesteria piscimorte
C. killer algae


D. a science fiction