题干

细胞膜的成分中含量较高的物质是(    )

A:糖类和水

B:脂质和蛋白质

C:蛋白质和糖类

D:水和脂质

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答案(点此获取答案解析)

B

同类题2

阅读下文,回答问题。

       从此就看见许多陌生的先生,听到许多新鲜的讲义。解剖学是两个教授分任的。最初是骨学。其时进来的是一个黑瘦的先生,八字须,戴着眼镜,挟着一叠大大小小的书。一将书放在讲台上,便用了缓慢而很有顿挫的声调,向学生介绍自己道:

       “我就是叫作藤野严九郎的……”

       后面有几个人笑起来了。他接着便讲述解剖学在日本发达的历史,那些大大小小的书,便是从最初到现今关于这一门学问的著作。起初有几本是线装的;还有翻刻中国译本的,他们的翻译和研究新的医学,并不比中国早。

       那坐在后面发笑的是上学年不及格的留级学生,在校已经一年,掌故颇为熟悉的了。他们便给新生讲演每个教授的历史。这藤野先生,据说是穿衣服太模胡了,有时竟会忘记带领结;冬天是一件旧外套,寒颤颤的,有一回上火车去,致使管车的疑心他是扒手,叫车里的客人大家小心些。

       他们的话大概是真的,我就亲见他有一次上讲堂没有带领结。

       过了一星期,大约是星期六,他使助手来叫我了。到得研究室,见他坐在人骨和许多单独的头骨中间,——他其时正在研究头骨,后来有一篇论文在本校的杂志上发表出来。

       “我的讲义,你能抄下来么?”他问。

       “可以抄一点。”

       “拿来我看!”

       我交出所抄的讲义去,他收下了,第二三天便还我,并且说,此后每一星期要送给他看一回。我拿下来打开看时,很吃了一惊,同时也感到一种不安和感激。原来我的讲义已经从头到末,都用红笔添改过了。不但增加了许多脱漏的地方,连文法的错误,也都一一订正。这样一直继续到教完了他所但任的功课:骨学,血管学,神经学。

       可惜我那时太不用功,有时也很任性。还记得有一回藤野先生将我叫到他的研究室里去,翻出我那讲义上的一个图来,是下臂的血管,指着,向我和蔼的说道:

       “你看,你将这条血管移了一点位置了。——自然,这样一移,的确比较的好看些,然而解剖图不是美术,实物是那么样的,我们没法改换它。现在我给你改好了,以后你要全照着黑板上那样的画。”

       但是我还不服气,口头答应着,心里却想道:

       “图还是我画的不错;至于实在的情形,我心里自然记得的。”

同类题5

阅读理解

    Every day, we are inching closer to some kind of artificial intelligence. Advances in big data, machine learning and robotics are going to give us a world where computers are effectively intelligent in terms of how we deal with them. Should you be scared by this? Absolutely, but not in the usual “robot overlords” (机器人帝国) kind of way. Instead, the real fear should be about getting human beings wrong, not getting AI right.

    The key to the technology is the ability of computers to recognize human emotions based on the ‘‘activation” of muscles in the face. A computer can identify the positions of facial muscles and use them to infer the emotional state of its user. Then the machine responds in ways that take that emotional state into account.

    One potential application of it is to provide “emotional robots” for the elderly. Having a machine that could speak in a kind way would comfort a lonely older person. That is a good thing, right? But that won't also relieve us from questioning how we ended up in a society that takes care of the elderly because we don't know what else to do with them? Can't we have more humane solutions than robots?

    “Emotion data” aren't the same thing as the real and vivid emotional experiences we human beings have. Our emotions are more than our faces or voices. How can they be pulled out like a thread, one by one, from the fabric of our being?

    Research programs can come with much philosophical concern, too. From the computers' point of view, what the computing technology captures are emotions, but at its root is a reduction of human experience whose outward expressions can be captured algorithmically (计算上). As the technology is used in the world, it can reframe the world in ways that can be hard to escape from.

    The technology will clearly have useful applications, but once it treats emotions as data, we may find that it is the only aspect of emotion we come to recognize or value. Once billions of dollars floods into this field, we will find ourselves trapped in a technology that is reducing our lives. Even worse, our “emotion data” will be used against us to make money for someone else. And that is what scares me about AI.