在焊接过程中，产生的物理有害因素包括( )。A．焊接弧光 B．焊接烟尘 C．有害气

环境和能源是人类生存的基本条件，下列连线前后关系不正确的是（  ）

A．过量排放CO₂﹣形成酸雨

B．回收废弃塑料﹣防止白色污染

C．发展太阳能﹣开发清洁能源

D．限制生产含磷洗衣粉﹣减少水污染

一个三角形被任意一边上的中线分成两个三角形，则这两个三角形：①形状相同；②面积相同；③全等，上述说法中正确的有[ ]

A.0个

B.1个

C.2个

D.3个

女性，60岁。上腹部疼痛4年，进食后加重，胃镜检查示胃小弯侧有颗粒状物，病理示重度不典型增生，HP（+），治疗方案应选择（）

A.手术

B.放疗

C.化疗

D.抑酸剂

E.黏膜保护剂

E

Once upon a time in a land far away, there was a wonderful old man who loved everything：animals, spiders, insects...

One day while walking through the woods the nice old man found a cocoon（茧）of a butterfly. He took it home. A few days later, a small opening appeared; he sat and watched the butterfly for several hours as it struggled to force its body through that little hole. Then it seemed to stop making any progress. It appeared as if it had gotten as far as it could and it could go no farther. Then the man decided to help the butterfly, so he took a pair of scissors and snipped off the remaining bit of the cocoon.

The butterfly then emerged（露出）easily.

But it had a swollen body and small, shriveled wings. The man continued to watch the butterfly because he expected that, at any moment, the wings would enlarge and expand to be able to support the body, which would contract（收缩） in time. Neither happened! In fact, the butterfly spent the rest of its life crawling around with a swollen body and shriveled wings.

It never was able to fly.

What the man in his kindness and haste did not understand was that the restricting cocoon and the struggle required for the butterfly to get through the tiny opening were Nature's way of forcing fluid from the body of the butterfly into its wings so that it would be ready for flight once it achieved its freedom from the cocoon.

Sometimes struggles are exactly what we need in our life. If we were allowed to go through our life without any obstacles, it would cripple us. We would not be as strong as what we could have been.

And we could never fly.

小题1:In the story, what happened to the cocoon of the butterfly after the man’s help?

A．The cocoon was broken and the butterfly died.

B．The man helped the butterfly out of the cocoon more easily

C．The butterfly couldn’t fly for ever normally.

D．The butterfly should spend more time practicing flying.小题2:What would have happened to the butterfly without the old man’s help?

A．It would have died in the cocoon.

B．It would have become a true butterfly.

C．It would have been strong enough to go farther.

D．It would have stopped struggling through the cocoon.小题3:The underlined word “cripple” in Paragraph 7 probably means ______.

A．disable

B．climb

C．enable

D．beat小题4:What can we learn from this story?

A．Man can never go against nature.

B．It’s necessary to live with some difficulties.

C．One cannot help others without thinking twice.

D．Mankind should take good care of insects.

阅读下面一段文字，完成下列问题。

①生物体都具有感觉器官，无论是感知物理信息抑或检测化学信息的这些自然感测器，都是生物体藉以获得生存必需信息的良好帮手。然而人要获得客观世界的大量信息，光凭人类自身的感觉器官是远远满足不了的，必须借助人造的各类感测器。

②科学家们首先想到的是存在于生物体内的2000多种不同的酶。由于在人体生命活动中担任催化剂作用的酶具有严密的对象选择性，即某一种酶只促成对应的某种对象的化学反应，科学家们就巧妙地设计出各种带不同酶的生物类化学感测器。为了克服酶会溶于水而不能反复使用的技术难题，他们又将酶涂布在高分子膜上，然后将这种带酶的膜放进所测试的采样中，催化受质(待测的特定化学物质)的化学反应。在膜附近产生或消耗的其他化学物质，通过膜上带有的碳电极测定化学物质的浓度变化，就能间接地计算出原受质的浓度。这样，只要使用不同的酶，便可制成测定各种不同化学物质的生物感测器了。

③这种生物感测器是高技术的结晶。它利用了先进的印刷和半导体加工技术。先在基板上印刷碳电极，再印刷附着特定酶的膜，之后裹上多孔的高分子膜，类似集成电路的制作。一般是在同一基片上制成大量感测元件，只要将它们切开，就能同时制成多枚生物感测器。

④如今科学家已不满足于上述利用物质电特性制成的生物感测器，他们又投入以物质的光特性为基础的光纤传感类的新型生物感测器的研制，并将其广泛应用于各个领域。

第三段的“这种生物感测器”指什么正确的一项是（）。

A．科学家根据酶具有催化作用的特点，通过联想而制造的带不同酶的感测器。

B．科学家根据生命活动中担任催化剂作用的酶具有严密的对象选择性而设计的人造感测器。

C．科学家利用先进的印刷和半导体加工技术，设计制造的人造感测器。

D．科学家将酶涂布在高分子膜上，然后进行催化受质的化学反应而制造出来的感测器。