题干

下列工程技术和获得产物对应关系不正确的是(     )

A:蛋白质工程----保存期长的干扰素

B:植物组织培养-----紫杉醇

C:体细胞核移植------试管牛

D:动物细胞融合------杂交瘤细胞

上一题 下一题 0.0难度 选择题 更新时间:2016-01-07 02:17:15

答案(点此获取答案解析)

C

同类题2

阅读下文,回答问题

最初的温暖

    ①男孩小时候家里很穷,甚至有时连上学的本子也买不起,常常用完了正面用反面。一天,班里来了位新生,是个漂亮的女孩,扎着鲜艳的蝴蝶结,背着一个让全班同学都眼红的书包。

    ②女孩跟他成了同桌。她的文具盒里装满了各种漂亮的笔和橡皮,她还有很多崭新的方格本,甚至有精装的笔记本。男孩偷眼看,心里既嫉妒又眼馋。

    ③男孩自尊心很强,怕女孩笑话,本子用完便不再用反面,也就不记笔记,只靠脑子记。女孩感到很奇怪,有一天问他,他说:“会了,不用记了。”女孩好像明白了什么,主动拿出两个本子给他,男孩拒绝了,女孩羞红了脸,几天不和他说话。有一次,班里组织看电影,每人交5分钱,男孩没有钱,就没有报名。女孩高兴地跑到他跟前,说:“明天下午看电影,我替你把钱交了。”男孩气恼地说:“我不去,用不着你给我交。”女孩委屈地哭了,说:“你以后还给我还不行吗?”男孩没有再说话,勉强答应了她。

    ④第二年,女孩的家要搬了,男孩不知道要搬到哪儿,只觉得有一种留恋的感觉,仿佛丢了东西似的。知道她走的日期后,那一天他没有去上学,早早地候在一个十字路口----县城开往外地的车辆都要经过这。终于,一辆大货车开了过来,女孩和她的哥哥站在车厢里。女孩看见了他,高兴地向他挥,男孩想跟她说点什么可没有说出来,车速很快,一溜烟从眼前过去了。

    ⑤第二天上学,班里一个女同学给男孩送来一个沉甸甸的牛皮纸包,说是同桌留给他的。男孩打开,是厚厚一摞没用过的各式作业本,还有她用过的漂亮文具盒,里面装满了铅笔,还有一支能抽水的钢笔。笔中间夹着一张纸条,上面写着:“送给我最好的同桌。”

    ⑥男孩哭了,他突然觉得,从那天起,他的心知道了什么叫疼痛。

    ⑦那个文具盒,他一直保存着,有时候拿出来看看,眼前会晃动着一对鲜艳的蝴蝶结,一跳,一跳……

    ⑧几十年过去了,男孩读完大学,又读了博士,打拼多年后成为一家上市公司的老总。阅尽沧桑后,他越来越怀念那个当年跟他同桌的小女孩,于是在报纸上登了寻人启事,寻找那个叫王丽晨的女孩。

    ⑨电视台的记者闻讯后,邀请他做了一次访谈,面对现场的许多观众,他把藏在心底的那段往事说了出来,说到动情处,他几次哽咽,说如果能见一见当年同桌的女孩,此生也就无憾了。

    ⑩主持人问他:“为什么非要见她呢?相见不如怀念,保留最初的那份美好,为她祝福,不是很好吗?”

    ⑪他摇了摇头。

    ⑫主持人又说:“丽晨现在已经步入中年,也许已经发福,也许过得很不如意,如果是这样,你还会执意见她吗?”

    ⑬他说:“是的,我想当面对她说声谢谢。另外,如果她有什么难处的话,我想尽自己所能帮她一把。这么多年来,我一直想着她,甚至没有一天忘记过她,小时候,因为贫穷,我看过太多的冷眼,但她给了我最初的温暖,这成了我生命的动力……”他已经泪光莹莹,“我想看见她还美好地生活着,跟我一样呼吸着新鲜的空气,沐浴着温暖的阳光……”

    ⑭几天后,他收到一封信:“亲爱的刘同学,不瞒你说,那天我就坐在观众席上。之所以不见你,并不是因为你太富有,或者我已经老了,而是有些美只适合放在心里,就像一坛陈酒,—旦打开味道就淡了。感谢这么多年来,我一直活在你心里,如果你对我心存感激,那就在心里保存那份最初的美好并把它传递下去吧。”

    ⑮信是那位主持人写的,王丽晨是他的妹妹。她已于三年前病逝。

同类题3

 Foods that are well known to you may not be familiar to people from different places around the world. Tourists and travelers often get to try some unfamiliar food. That is part of the fun of traveling. Here are four people's experiences with foreign food.

David King is a Chinese student in France. “I never had cheese or even milk before I came to France. Cows are seldom seen in my part of China. So there is no milk or milk products. I drank some milk when I first arrived in France. I hated it! I tried cheese, too, but I didn't like it. I love ice cream, though that's made from milk.”

Birgit is from Sweden. She traveled to Australia on vocation. "I was in a restaurant that was special in fish. I heard some other people order flake, so I ordered some, too. It was delicious! Later, I learned that flakes is an Australian name for shark. Now, whenever I see a new food, I try it on purpose. You know why? I remember how much I enjoyed flake.”

 Chandra is a dentist in Texas. She is from India. “ I'm afraid to try new foods because maybe there is beef in them. I'm a Hindu(印度教信徒)and my religion(信仰) stops me from eating meat from the cow. That's why I can't eat hamburgers or noodles with meatballs.”

Nathan is from the United States. He taught for a year in China. “My friend gave me some 100-year-old eggs to eat. I didn't like their appearance at all. The eggs were green inside, but my friends said the color was normal. Chinese people put something on fresh eggs. Then they put them in the earth for three months. So the eggs weren't really very old. Even so, I didn't want to touch them.”