题干

下列现象中,不属于环境影响生物的是(    )

A:水体中过量的浮游生物会导致水质恶化

B:在寒冷地区栽种的橘,果实又小又酸   

C:在阴暗环境中,人参生长得很好

D:干旱会使植物萎蔫

上一题 下一题 0.0难度 选择题 更新时间:2018-10-18 09:39:14

答案(点此获取答案解析)

A

同类题1

根据短文内容, 从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    Have you ever heard of homecoming? It's a tradition celebrated every year in the US. At homecoming, a school or university welcomes back former students or alumni(校友).____It means, “coming home.”

    This is a time when everyone can get together.____There are events that encourage school spirit all throughout homecoming week, which leads to the big day on Friday.

    A major activity that most students will take part in is choosing the homecoming king and queen.____ This is a group of boys and girls who represent (代表) school spirit. At the end of the week, students vote for a boy and a girl to be the king and the queen.

    Then it's time for the football game, the main event of homecoming week! ____Almost everyone from school goes to the game: students, parents, teachers, and alumni visitors. If they win, everyone is very happy.

    ____ Students dress up, and some might even bring a date to go with them. After the dance, homecoming is officially over, and everyone can't wait for next year!

A. The last event is the homecoming dance.

B. That is where the name comes from.

C. Students get to pick who will be on homecoming court early in the week.

D. The tradition began more than 100 years ago in the United States.

E. The football team faces a lot of pressure to do well for the big crowd.

F. Homecoming usually lasts a week and happens in the fall.

G. Homecoming week was not just about fun, but also a chance to try out new things.

同类题5

课外精选美文阅读。

活在人类的心里

    在千万个悲伤的面孔和哀痛的心灵的围绕中,鲁迅先生安静地躺下了,一一正当黄昏朦脆地掩上大地,新月投着凄凄的光的时候。

    我们听见了人类的有声或无声的欷歔(xī xū,有惊讶感叹之意),看见了有形和无形的眼泪。没有谁的死曾经激动过这样广大的群众的哀伤;而同时,也没有谁活的时候曾经激动过这样广大的群众的欢笑。

    只有鲁迅先生。

    每次,当鲁迅先生仰着冷静的苍白的面孔,走进北大的教室时,教室里两人一排的座位上总是挤坐着四五个人,连门边连走道都站满了校内的和校外的正式的和非正式的学生。教室里主牢着极大的喧闹。但当鲁迅先生一进门立刻安静得只剩下呼吸的声音。他站往在讲桌边,用着锐利的目光望了一下听众,就开始了《中国小说史》那一课题。

    他的身材并不高大,常穿着一件黑色的、短短的旧长袍。不常修理的粗长的头发下露出方正的前额和长厚的耳朵,两条粗浓方长的眉毛躺在高出的眉棱骨上,眼窝是下陷着的,眼角微朝下垂着,浓密的上唇上的短须掩着他阔的上唇,——这种种看不出来有什么奇特,既不威严,也似乎不慈和。说起话来,声音是严缓的,既不抑扬顿挫,也无慷慨激昂的音调。他那拿着粉笔和讲义的两手,从来没有表情的姿势,帮助着他的语言。

    他叙述着极平常的中国小说史实,用极平常的语句,既不赞誉,也不贬毁。

    然而,教室里却突然爆发笑声了。他的每句极平常的话几乎都须被迫地停顿下来,中断下来。每个听众的眼前赤裸裸地显示了美与丑,善与恶,真实与虚伪,光明与黑暗,过去、现在和未来。大家在听他的中国小说史的讲述,却仿佛听到了全人类的灵魂的历史,每一件事态的甚至是人心的重重叠叠的外套都给他连根撕掉了于是教室里的人全笑了起来。笑声里混杂着欢乐与悲哀,爱恋与憎恨,羞惭与愤怒……于是大家的眼前浮露任来了一盏光耀的明灯,灯光下映出了一条宽阔无边的大道……大家抬起头来,见到鲁迅先生苍白冷静的脸上始终不曾流露出过一丝的微笑。

    他沉着地继续着他的工作,直至他不得不安静地休息的时候。

    还没有见过谁将自己的一生献给全人类,做着刺穿现实的黑暗和显示未来光明的伟大的工作,使那广大的群众欢笑,又使那广大的群众哀伤。

    只有鲁迅先生。

    他将永远活在现在的和未来的人类的心灵里。