题干

散尾葵每天可以蒸发一升水,是最好的“天然增湿器”.此外,它绿色的棕榈叶对二甲苯和甲醛有十分有效的净化作用.以上资料表明(  )

A:生物依赖环境

B:生物影响环境

C:环境影响生物

D:生物适应环境

上一题 下一题 0.0难度 选择题 更新时间:2019-04-05 03:13:59

答案(点此获取答案解析)

B

同类题2

通读下面短文,掌握其大意,然后在各题所给的四个选项中选出一个最佳答案。

    Three soldiers were on their way home from the war. They arrived at a small village, they were very tired and 1 but they had no food or money. The only thing they did have was a cooking pot(锅).

    The soldiers built a small cooking fire, 2 their pot on it, and poured in some water. When a few villagers asked what they were doing, one of the soldiers answered that he was making stone soup. A few more villagers walking by stopped to 3 what was going on when they heard about it.

    "Any soup needs salt and pepper," the first soldier said, 4 some children ran to fetch salt and pepper. "Stones can be used to prepare good soup, but tomatoes would 5 it so much better," the second soldier added. One woman said, "Why, I think I have a tomato or two! "She ran to get the tomatoes.

    "Some cabbage would be a proper choice for a good stone soup! "said the third soldier. Another woman said, "I think I can probably find some cabbage," and she ran 6.

    "If only we had a bit of beef and some potatoes, this soup would be fit for a rich man's 7." The villagers thought it over, then ran to fetch what they had in their homes. A rich man's soup, and all from a few stones! It seemed like 8!

    The soldiers said, "If only we had a little milk, this soup would be fit for a king!" And so other villagers 9 to get some milk.

    "The soup is ready," said the cooks, "and all will 10 it, but first we need to set the tables." Some of the villagers said, "Such a great soup would be better 11 some bread and cakes," so they brought the 12 two things and the meal was 13 by all. Never had there been such a 14 meal. Never had the villagers had such delicious soup, and all made from stones! They ate and drank and danced well into the night.

    In the morning, the villagers gathered to say goodbye. "Many thanks to you," they said, "for we shall 15 go hungry now that we have learned how to make soup from stones."

同类题4

阅读下列短文后回答问题:

       光合作用是地球上最伟大的化学反应,人类对它由疑惑到认知、再到利用,经历了漫长的过程.

       从古希腊的亚里士多德开始,海尔蒙特、普里斯特利、英格豪斯、谢尼伯、梅耶和季米里亚捷夫等多个国家的科学家们相继通过自己的实验研究,逐渐帮助人们开始探寻光合作用这个神秘而伟大的生命活动.但对于光合作用的条件和产物,一直不得其解.

       1864年,德国科学家萨克斯做了一个实验:他先把绿叶在暗处放置24个小时;然后选取一个叶片,让其一半曝光,另一半遮光;一段时间后,将这个叶片取下放在隔水加热的酒精中脱色,再用碘蒸气进行处理.最终发现曝光的区域呈深蓝色,遮光的区域则没有颜色变化.

       1883年,美国的恩吉尔曼把一些好氧并能运动的细菌放入盛有一条丝状绿藻的溶液中并制成装片,放在没有空气且黑暗的环境中,然后用极细的光束照射丝状绿藻,发现细菌只向叶绿体被光照射到的部位集中.

       在此之后,美国的科学家鲁宾、卡门、卡尔文等人通过更精确的方法对光合作用进行了更为深入地研究,人们才逐渐揭开了它的神秘面纱.光合作用的发现不仅彰显了人类的智慧,对其进行深入的了解才能帮助人们更好地解释生活现象,应用于农业生产.