题目内容

【题目】(8分)下表是缺碘与不缺碘的两类人群中,血液中与甲状腺活动密切相关的两种激素的含量状况。

分泌腺体

激素名称

不缺碘人群激素含量

缺碘人群激素含量

补碘前

补碘后

甲状腺

甲状腺激素

正常

降低

正常

垂体

A

正常

B

正常

(1)表中A是______________,B应________________。甲状腺激素对垂体分泌激素A起________作用。在甲状腺激素的分泌调节中,控制枢纽是________________________________。

(2)长期缺碘,成年人会表现出:①喜热、畏寒等体温偏低现象;②少言寡语、反应迟钝及嗜睡等现象。现象①说明甲状腺激素的相关作用是____________;现象②说明该激素对神经系统的作用是______________。通常,食用碘盐可以防治碘缺乏病。

(3)体液调节与神经调节比较,作用范围_____,需要__________的运输。

【答案】(8分,每空1分)(1)促甲状腺激素 升高 抑制(反馈调节) 下丘脑

(2)促进新陈代谢 提高兴奋性

(3)广泛 体液

【解析】(1)下丘脑分泌的激素为促甲状腺激素释放激素,缺碘的人群中甲状腺激素含量比较低,会促进下丘脑分泌促甲状腺激素释放激素,此时垂体分泌促甲状腺激素增多。

(2)体温偏低说明体内的物质氧化少,产生的热量少;少言寡语、反应迟钝及嗜睡说明神经的兴奋性不高。因此,现象①说明甲状腺激素的相关作用是促进新陈代谢;现象②说明该激素对神经系统的作用是提高神经系统的兴奋性。(3)体液调节与神经调节比较,作用范围较广泛,并需要体液的运输。

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【题目】完形填空

阅读下面的短文,从短文后各题所给的A、B、C和D四个选项中,选出可以填入空白处的最佳选项。

I spent two years homeschooling my boys, Harper and Will.I am a trained Waldorf__1__. Before teaching my boys at home, I had been teaching at Waldorf for many years.

I spent years__2__education in college and had many years of teaching experience.__3__, I learned more about how children learn during those two years than I did from all my teaching training and the books I had read on__4__.

I wanted to give my children a__5__Waldorf experience at home.Therefore, when we started, I__6__a mini-Waldorf school at home, complete with walls, wooden desks, and a large__7__.

Since I had also__8__to homeschool my niece, I had to offer teaching to three__9__grades, as it would be taught in a Waldorf school.During the first couple of months, I would often__10__until midnight preparing three lesson plans: I was getting__11__. I worked hard, but my students seemed to be growing more and more__12__my lessons.

I knew that something had to__13__. I had to relax and let go of my thought of what and when the children should learn.We__14__planning more field trips, which were warmly__15__. They all liked it.

We had a talk with a naturalist about eagles and owls.Then I turned our newly found interest into__16__. We drew pictures of owls and eagles__17__coloured pencils; we read a poem about owls; we learned an American song about the eagle and__18__it on our recorders.

Our__19__became more inspired by the children’s interests, and our days became much lighter and__20__.

【1】A. teacher B. doctor C. writer D. waiter

【2】A. imagining B. improving C. finding D. studying

【3】A. Still B. However C. Or D. Also

【4】A. food B. dressing C. travelling D. education

【5】A. long B. new C. real D. special

【6】A. created B. painted C. visited D. bought

【7】A. bathroom B. kitchen C. bed D. blackboard

【8】A. remembered B. agreed C. seemed D. joined

【9】A. large B. strange C. easy D. different

【10】A. stay up B. wake up C. look up D. stand up

【11】A. excited B. pleased C. tired D. relaxed

【12】A. fond of B. uninterested in C. careful about D. surprised at

【13】A. last B. move C. change D. succeed

【14】A. started B. stopped C. disliked D. minded

【15】A. spent B. talked C. paid D. welcomed

【16】A. methods B. activities C. places D. wishes

【17】A. on B. around C. with D. for

【18】A. answered B. watched C. printed D. played

【19】A. dream B. cost C. learning D. vacation

【20】A. happier B. worse C. cheaper D. bigger

【题目】C

Disposing(处理) of waste has been a problem since humans started producing it. As more and more people choose to live close together in cities, the waste disposal problem becomes increasingly difficult.

During the eighteenth century, it was usual for several neighboring towns to get together to select a faraway spot as a dump site. People would transport household rubbish, rotted wood and old possessions to the site. Regularly some of the trash was burned and the rest was buried. The unpleasant sights and smells caused no problem because nobody lived close by. Factories and some other industrial sites also had waste to be disposed of. Those located on rivers often just poured the unwanted remains into the water. Others built huge burners with chimneys to deal with the problem.

Several facts make these choices unacceptable to modern society. The first problem is space. Dumps(垃圾场), are most needed in heavily populated areas. Such areas rarely have empty land suitable. Farm areas are refusing to accept rubbish from elsewhere, cheap land in major city areas to dispose wastes is nonexistent(不存在的). Awareness of pollution dangers has resulted in more strict rules of waste disposal. Pollution of rivers, ground water, land and air is a price people can no longer pay to get rid of waste. The amount of waste, however, continues to grow.

Recycling efforts have become a commonplace(常见的事), and many towns require their people to take part. Even the most efficient recycling programs, however, can hope to deal with span>only about 50 percent of a city’s reusable waste, so more people should be involved in recycling programs.

【1】The most suitable title for this passage would be .

A. Places for Disposing of Waste B. Waste Pollution Dangers

C. Ways of Getting Rid of Waste D. Waste Disposal Problem

【2】 During the 18th century, people disposed of waste in many ways except for .

A. burying it B. recycling it

C. burning it D. throwing it into rivers

【3】What can be inferred from the third paragraph?

A. Farm areas will continue accepting waste from the city.

B. There is cheap land to bury waste in modern society.

C. It is difficult to find space to bury waste in modern society.

D. Ways to deal with waste in modern society stay the same.

【4】The main purpose of writing this article is to .

A. select a suitable dump site B. warn people of the pollution dangers

C. call on people to take part in recycling programs D. tell people a better way to get rid of the waste

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