题干

以下几种结构中,属于保护组织的是(    )

A:一小段新鲜木头

B:一小块番茄果肉

C:一小块洋葱表皮

D:一段带叶的枝条

上一题 下一题 0.0难度 选择题 更新时间:2015-06-16 05:51:40

答案(点此获取答案解析)

C

同类题3

阅读下文,完成下列小题

我说,你听

    ①她曾经可以做到,连续数小时说个不停,且是站着说,微笑着说,声情并茂的说。她也会让身边的人开口说话,无论你多木nè、多胆怯,她都有办法让你开口。她的提问方式极为温和。时间久了,即使是最不爱学习的学生也会被她的课迷住。

    ②有一个学生,恰好转在她的班。因刚到新地方,新同学上课有点走神。她正在台上讲作文,说到细节描写的话题。她说:“譬如,(甲)那位新同学的头发天生的黑而纯,可以说黑得像缎子,也可以说顺滑得似瀑布。”

    ③大家一齐向那个新同学的头发看,新同学的脸微微发红,心立刻回到课堂上。

    ④接着,她若无其事地继续说:“大家看看我,能说说我的一些特点吗?不许恭维我啊。”大家听了都笑。

    ⑤那个新同学先获得了发言的机会。她鼓励说:“我刚才说了你的头发,你现在可以说我的某个特征。看,你可以后发制人,主动权更大。”同学们又笑。气氛轻松活泼了,新同学也不怕了,她果断地说:“(乙)老师,你的眉心有颗红痣,圆圆的,像一枚红豆镶在那儿,泛着柔润的红晕。”

    ⑥她大声说“好”。

    ⑦那位新同学渐渐发现,她们班有一个共同的喜好,就是特别喜欢语文,这与她的教学方式密切相关。

    ⑧那个当年的新同学就是我。后来,有幸和她一起共事,向她学习教书的艺术。

    ⑨有一年,学校考虑到她快退休了,没有给她排课,只是让她负责年级学科的教研工作。她很生气。那是我第一次见她生气。她说:“不上课,有什么教可以研的?”学校只好继续让她授课。就这样,她一直工作在讲坛第一线。从教几十年,没有缺过学生一节课,也从未对学生发过一次火。最后,她是从讲台上退休的。

    ⑩可是,现在她不会讲话了,经常一个人长时间静坐。别人问她话,她也不理。医生说她是脑梗。我不愿相信,一个擅长语言的人,并且是一个让语言散发魅力的人,会失去语言。也许,她是讲累了,一旦有机会休息,就想好好享受一下。等她休息好了,就好了。(丙)可我面对她,呼唤“老师”的时候,她坐在轮椅上,头微低,没有任何反应。我的眼泪喷涌而出。

    ⑾她家的茶几上有不少中学语文课本,是进行刺激治疗的道具。我打开一本书,轻轻对她说:“老师,我以前听你讲了许多。今天,我来说,你听。”她没有一点反应,保持原姿态坐着,雕塑一样。

    ⑿“她的头发天生得纯,可以说黑得像缎子,也可以说顺滑得似瀑布。”

    ⒀“你的眉心有颗红痣,圆圆的,像一枚红豆镶在那儿,泛着柔润的红晕。”

    ⒁她的头微抬,面部表情有了细微的变化,似乎是尽了最大的努力,她的嘴唇颤抖着用微弱的声音说:“好!”

(选自《小小说选刊》,有改动)

同类题5

阅读短文, 根据短文内容回答问题。

    Garbage(垃圾) Island

    You can't see it from the air. It's almost impossible to see from a ship. But somewhere in the North Pacific is a huge island of garbage, just below the water surface.

    What is the island made of?

    The garbage island is not an island, but a collection of millions of plastic and other objects. The water movements of Pacific Ocean bring the objects together and cause them to go around in a big circle.

    Charles Moore found it in 1997 and named it “the Great Pacific Garbage Patch” .

    Where does all the plastic come from?

    Much of the garbage comes from everyday objects, such as shopping bags and water bottles. Some of these objects finally reach the ocean. Garbage from the western coast of North America takes about six years to reach it. Objects from East Asia take about a year. Other garbage comes from ships passing through the area.

    Is the Garbage Patch dangerous?

    The larger pieces of garbage are a problem for wildlife. For example, sea turtles(海龟)and seabirds often think the plastic is their food. They eat the plastic and die.

    In addition, the plastic stops sunlight from reaching deeper water. Without sunlight, very small sea animals die. Then, there is less food for larger fish to eat.

    What can we do to help stop it?

    Cleaning up the island isn't easy. But we can make people realize the problem. One environmentalist(环保主义者), David de Rothschild, is sailing around the world in boat made of plastic bottles to teach people about the problem of garbage in the sea.

    Another idea is that we can recycle the plastic garbage. Environmental engineer Cesar Harada is building a robot that collects pieces of plastic. Harada hopes to use his robot in the Pacific. Harada also has a website for reporting environmental problems. He says, “I hope everybody can become an environmental activist.”