问题 单项选择题 A1/A2型题

肾癌的影像学表现中不正确的是()。

A.增强后显示肿瘤为均匀强化,坏死区增多及明显

B.绝大部分肿瘤呈圆形、椭圆形或不规则的结节或肿块,可有分叶

C.肿瘤可有钙化,钙化形态为不规则点状、小曲线、条状、斑片状或不规则大块状

D.肾癌绝大多数是高血供肿瘤

E.约有5%~7%的肿瘤呈囊状或囊实性,称为囊性肾癌

答案

参考答案:A

解析:肾癌增强后显示肿瘤为不均匀强化。

阅读理解

阅读短文,选择正确选项。

       A great new invention by a British student will help children who are overweight. It will also reduce the

number of hours of television they watch every day. The technology is nicknamed "Square-Eyes". It is a tiny,

computerized sensor (感应器) that fits into children's shoes. It measures the number of steps the child takes

during the day and sends the information to the family computer. Software then tells the child how many hours

of TV he or she can watch that evening. One hundred steps equal (等于) one minute of TV. If children use up

all of their viewing time, they must do more walking.

       The designer Gillian Swan says this will help children to include exercise in their daily life from an early age.

Ten years ago children were healthier because they played outside with their friends. But today's children spend

too much time in front of TV and don't exercise. This means children have weight problems and become fat.

"Square-Eyes" is nickname often given to children who watch too much television. It may now have a new

meaning. The new technology is the beginning of computers that become a part of our clothes. What we wear

will soon monitor our health.

1. The invention can help children who have ______ problems. [ ]

A. weight

B. feet

C. walking

D. computer

2. If Jim wants to watch TV for half an hour, he should walk ______ steps. [ ]

A. one million

B. fifty thousand

C. three thousand

D. forty thousand

3. Which of the following is TRUE according to Paragragh 2? [ ]

A. "Square-Eyes" makes it easier for children to watch TV.

B. Children ten years ago liked watching TV with their friends.

C. Today's children like playing outside more than the children ten years ago.

D. The invention can help children take more exercise from an early age.

4. What does the underlined word "monitor" mean in Chinese?[ ]

A. 影响

B. 监视

C. 主持

D. 变化

问答题

认真阅读短文,并回答问题:

近年来,由于传统能源消耗量的迅速增加以及环境污染问题日趋严重,许多国家大规模地开展了新能源的探索工作,其中氢能是重要的二次能源之一.氢是一种清洁能源,燃烧时不产生污染环境的烟尘和硫氧化物,其燃烧生成物是水,不破坏地球的物质环境.人们对氢能技术开发寄予了很大期望.

氢能开发利用首要解决的是廉价氢源问题.从煤、石油和天然气等化石燃料中制取氢气,国内虽已大规模的生产,但从长远观点看,这已不符合可持续发展的要求.从非化石燃料中制取氢气才是正确的途径.在这方面电解水制氢已具备规模化生产能力,研究降低制氢电耗有关的科学问题,是推广电解水制氢的关键.目前科学家们认为高效率制氢的基本途径是利用太阳能.如果能用太阳能制氢,那就等于把无穷无尽的,分散的太阳能转变成了高度集中的干净能源了,意义十分重大.目前利用太阳能分解水制氢的方法有太阳能热分解水制氢、太阳能发电电解水制氢、阳光催化光解水制氢,太阳能生物制氢等等.

(1)从能源分类角度来看,氢能源属于______次能源.

(2)目前利用太阳能分解水制氢的方法有______和______等.

(3)为了获得氢能源,必须采用先进的方法,以下所提供的方法中你认为可行的是______

A、由热电站提供电力电解水.

B、改进以焦炭和水制水煤气的方法

C、利用太阳能分解水

D、使用炽热的铁和水蒸气反应制得.

(4)氢作为能源与其他能源相比,具有______和______等优点.、