试题与答案

材料:绿色楹物通过光合作用制造有机物提出问题:(1)绿叶在光下制造的有机物是不是淀粉

题型:问答题 案例分析题

题目:

材料:

绿色楹物通过光合作用制造有机物

提出问题:

(1)绿叶在光下制造的有机物是不是淀粉?

(2)光是绿叶制造有机物的必要条件吗?

(3)叶绿体是进行光合作用的场所吗?

作出假设:

(1)绿叶在光下制造的有机物是淀粉。

(2)光是绿叶制造有机物的必要条件。

(3)叶绿体是进行光合作用的场所。

设计方案:

学生根据课本已有的实验方案.再进行设计以完善改进自己的实验方案。

确定方法步骤:

(1)把盆栽的天竺葵放在黑暗处一昼夜。

(2)用黑纸片把叶片的一部分从上下两面遮盖起来,然后移到阳光下照射。

(3)几小时后,摘下叶片,去掉遮光的纸片。

(4)把叶片放入盛有酒精的小烧杯中,隔水加热,使叶片含有的叶绿素溶解到酒精中,叶片变黄变白。

(5)用清水漂洗叶片。

(6)再把叶片放到培养皿里,向叶片滴加碘液。

(7)稍停片刻,用清水冲掉碘液,观察叶色发生了什么变化。

实验结束后,互相表达与交流,最终得出结论。

问题:

分析上述材料,根据实验目的分类,该实验属于哪一种类型?

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A

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C.O.P.D(慢性障碍性肺病) blocks air flow through the lungs. It makes breathing difficult. The leading cause of C.O.P.D. is cigarette smoking. Experts at the National Institutes of Health in the United States say there is no cure to the damage to the lungs.

Dawn Demeo is an assistant professor at Harvard Medical School in Boston, Massachusetts. She said, “By 2020, C.O.P.D. may be the third leading cause of death across the world.”

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She is the lead author of a study by a team from Harvard’s Brigham and Women’s Hospital and the University of Bergen in Norway. The new study adds to findings that women may be more at risk than men from the damaging effects of smoking.

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A. Cigarette smoking is likely to cause C.O.P.D.

B. C.O.P.D. makes it hard for a person to breathe

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B. Smoking Triggers Diseases

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D. Women Suffers More from C.O.P.D. than Men  

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A.Science

B.Health report

C.Education

D.Business report

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