50mA电流属于（）。 A.感知电流 B.摆脱电流 C.致命电流

莫高窟可以傲视异邦古迹的地方，就在于它是一千多年的层层累聚。看莫高窟，不是看死了一千年的标本，而是看活了一千年的生命。一千年而始终活着，血脉畅通、呼吸匀停，这是一种何等壮阔的生命!壁画上这些朦胧的印象，稍一梳理，已颇觉劳累，像是赶了一次长途的旅人。据说，把莫高窟的壁画连起来、整整长达60华里。我只不信，60华里的路途对我轻而易举，哪有这般劳累 这段文字作者意在表明( )。

A．那个认为莫高窟壁画长达60华里的传说不可信

B．莫高窟壁画具有历史的凝重感和鲜活的生命力

C．莫高窟比其他异邦古迹更具有历史价值

D．莫高窟壁画给人以一种特有的沉重感

服用激素类药物应注意()

A．饭前服用，同时补充维生素D及钙剂

B．避免与链霉素、氨基糖苷类药物同时使用

C．用药后大量饮水，同时碱化尿液

D．长期服用营养神经性药物

E．按时、按量、不可随意加减药物

B

People all over the world today are beginning to hear and learn more and more about the problem of pollution. Pollution is caused either by man's release of completely new and often artificial substances into the environment, or by releasing greatly increased amounts of a natural substance , such as oil tankers into the sea．

The whole industrial process which makes many of the goods and machines we need and use in our daily lives, is bound to create a number of waste products which upset the environmental balance, or the ecological balance as it is also known. Many of these waste products can be prevented or disposed of sensibly, but clearly while more and more new and complex goods are produce there will be new, dangerous wastes to be disposed of, for example, the waste products from nuclear power stations. Many people, therefore, see pollution as only part of a larger and more complex problem, that is, the whole process of industrial production and consumption of goods. Others again see the problem mainly in connection with agriculture, where new methods are helping farmers grow more and more on their land to feed our ever-increasing populations. However, the land itself is gradually becoming worn out as it is being used in some cases, too heavily, and artificial fertilizer cannot restore the balance.

Whatever its underlying reasons, there is no doubt that much of the pollution caused could be controlled if only companies, individuals and governments would make more efforts. In the home there is an obvious need to control litter and waste. Food comes wrapped up three or four times in packages that all have to be disposed of; drinks are increasingly sold in bottles or tins which cannot be reused． This not only causes a litter problem, but also is a great waste of resources, in term of glass, metals and paper. Advertising has helped this process by persuading many of us not only to buy things we neither want nor need, but also to throw away much of what we do buy. Pollution and waste combine to be a problem everyone can help to solve by cutting out unnecessary buying ,excess consumption and careless disposal of the products we use in our daily lives.

45．The underlined phrase “disposed of ”in the second paragraph means_______.

A． dealt with               B． exposed 

C． disapproved of           D． collected

46． In the writer’s view ,the more new goods, _______.

A． the less pollution             

B． the harder pollution can be prevented

C． the more pollution there will be

D． the more easily pollution can be controlled

47．What can we learn from the last paragraph?

A． We can do much to reduce pollution.

B． The government is trying hard to stop pollution.

C． Individuals know how to get rid of the habit of littering everywhere.

D． We can’t stop buying unnecessary things.

48． People can help solve the problem of pollution by _______.

A． urging their governments to control litter and waste

B． making anti-pollution advertisements

C． cutting down the use of oil and other oil products

D． reducing unnecessary buying, over-consumption and careless disposal of wastes

全科医生的任务很多，其中包括（）

A.建立并利用个人、家庭健康档案

B.处理社区常见病、多发病，把握会诊、转诊时机

C.开展个人与群体的健康教育

D.提供初步的心理咨询及治疗等基本的精神卫生服务

E.必须能处理病人的疑难危重问题

RM格式通常为Real Media，它的特点不正确的是（）

A.画质清晰

B.适合用于在线播放

C.画质仍能保持的相对良好

D.文件小