题干

下列关于一株大豆和一条鲫鱼的叙述,错误的是(  )

A:都由一个细胞﹣﹣受精卵发育而来

B:其细胞都具有的基本结构是细胞膜、细胞质、细胞核

C:其细胞内都具有的能量转换器是线粒体

D:大豆的叶、鲫鱼的鳃都属于组织

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答案(点此获取答案解析)

D

同类题1

阅读下面的文字,完成下列小题。

莫高窟的挣扎

蒋方舟

    人生从未如此文化苦旅过,前段时间,我重走了丝绸之路。真是苦旅,戈壁沙漠再辉煌壮丽,一成不变的景色看久了,即便是王维,也吟不出什么新的诗句。

    西域的入口是敦煌,僧人求法之旅从这里开始。当我在大马路上饥寒交迫接近绝望的时候,看到无尽的青黑天下压着金边,有夕阳霞光的地平线处就是敦煌,当时场景就像电视剧《西游记》的一幕,我好激动,马上想说的是:“大师兄,你快看,那就是敦煌。”

    进了城,《西游记》里面奇诡的神秘文明,变成了现代化的摩登小城,紧凑洁净。擦肩而过的很多都是外国人,场景让人有点穿越,它仿佛又变成了丝绸之路上中西贯通的重镇,异国商贾云集,胡人遍布。

    到敦煌当然是为了看莫高窟。我去之前,就有很多人告诉我:“莫高窟一定会让你觉得失望的。”乍一看,确实是如此,这里和中国其他旅游景区没有区别,到处都是戴着墨镜、遮阳帽,满脸不耐烦地排队的游客。人群里最大声的永远是小朋友的哭喊,都吵着要回家。

    但我并没有失望,因为原本也不是为了寻找民族自豪感而来的。

    400多个洞窟只开放了20多个,看完感受最深的是:美的事物总逃不过重重磨难,以及它自身求生的挣扎。

    第一重磨难来自自然。这里的雨少风大,强风把沙子吹到崖面。天长地久,入口处设置的窟檐逐渐磨损,失去了遮蔽阳光的功能。莫高窟高大,俯仰天地,却在很长一段时间内是一副衣不蔽体的模样。

    第二重磨难来自宗教变迁。佛教传入中国之后,经历过四次灭佛的劫难。最早是北魏太武帝:“各地有造佛像者诛,有经书焚烧,有僧侣悉坑之。”敦煌由于偏远,不仅没有受到废佛令的破坏,反而成为中西僧侣和教徒的避难所。他们把信念附在一斧一凿里。

    到了11世纪,新疆部分地区开始信奉伊斯兰教。佛教僧侣预感到劫难的可能性,就把数万件经书和藏画放在17窟中近千年。17窟就是著名的藏经洞,早就被洗劫,经书和佛像都已不在,只有当时藏经和尚洪辩的雕塑孤寂地守着空无一物的洞窟。

    第三重磨难是“不懂”。大部分洞窟中的佛像都在清朝重新修过。绝美的壁画围簇下,往往是呆滞死板的佛像,脸被涂得红红白白,一点表情都没有,眼珠是琉璃珠子,亮得又假又可疑,毫无动人之处。

    开放参观的洞窟里,只有隋朝修的一窟佛像从未被重塑过,三座佛像,分别是“过去佛”“现在佛”“未来佛”。低眉的是弥勒,慈悲带笑,婉约悲悯至极;窟顶是直坠而下的飞天,飞天总是成双的,窟壁四周是撒满金粉的千佛像,现在金粉金箔脱落了大半。在这样的洞窟前,人一进去就有下跪的欲望——出于对美的诚惶诚恐。

    第四重磨难是“不惜”。藏经洞被发现之后,当时看管莫高窟的王道士成了千古罪人。历史上真实的王道士,虽然不懂,但是他爱惜。他先是看到官府在运输他至爱的经书时造成破损,看到送给当地官员的精品文物下落不明,然后他才变成了所谓的“卖国贼”。

    到了“文革”,当时莫高窟的48位工作人员分裂成大约12个革命派系,成天激烈内斗,所幸他们都同意一个原则:不能碰莫高窟。据说他们为了保护莫高窟,钉死了莫高窟所有的出入口。

    我想起清洗竹简上泥土的场景:当把竹简放入清洁剂中,字开始浮现,有的字开始从竹简表面脱落,像是在逃生。天下没有永恒的事物,美的文明不被发现就没有意义,可它暴露的一瞬间就面临着巨大的风险,就像“天将降大任于是人”一样,它必然要经历更多的磨难,几番挣扎求生才能活下来。

同类题5

根据短文理解,选择正确答案。

    There are many idioms in English. An idiom is a phrase that we can't understand from the meaning of each word. The following are some of them.

As the crow flies

    When a bird flies from place to place, it takes the most direct route. But when people drive, they have to follow roads and often go farther. When people give a distance "as the crow flies", they mean the shortest distance between the two points, not the distance you would have to travel by following roads.

    As Dan and his mum drove along the river, they could see the beach on the opposite side. Dan asked "How far is it to the beach?"

    "It's only about a quarter of a mile as the crow flies" his mother said.

Blow hot and cold

    In one of Aesop's Fables, a man blows on his fingers to warm them up and then blows on his soup to cool it down. In both cases, the man is opening his mouth, but what comes out is different. If a person says one thing and later says the opposite, we say that the person is blowing hot and cold.

    "Is Felicia going to try out for the soccer team this year?" Stacy asked.

    "I don't know," Tricia replied." Last week she was saying yes, but this week she's saying no. She's really blowing hot and cold."

Break the ice

    Nowadays people use the phrase to refer to ending an awkward silence by beginning a conversation.

    It was the first day of summer camp. The four girls began to make their beds in silence. None of the girls knew each other, and no one knew what to say. Finally, one of them broke the ice by saying" Hey, where's everybody from?"

Bury the hatchet

    In native American culture, when two nations agreed to end their war, they buried the hatchet. So to bury the hatchet is to make peace with someone else.

Colin could not excuse his sister for breaking his tennis racket. Finally, his sister said, "Colin, can't we bury the hatchet?"