首页
登录
职称英语
Drugs can be divided into three main groups: those that a person can buy wit
Drugs can be divided into three main groups: those that a person can buy wit
游客
2023-07-23
29
管理
问题
Drugs can be divided into three main groups: those that a person can buy without a prescription, those that a person needs a doctor’s prescription for, and those that are illegal.
Two popular nonprescription drugs are caffeine (咖啡因) and alcohol. Caffeine is found in coffee, tea, chocolate, and cola drinks. It is a mental stimulant; it stimulates the central nervous system and makes people feel alert. Students, for example, often find they can study better if they have a cup of coffee. On the other hand, caffeine can also make people nervous and irritable. If people drink too much caffeine, they may have trouble sleeping.
Alcohol is a depressant; it depresses the central nervous system. When people drink, they have less control over their actions. They cannot walk in a straight line and they cannot drive as well as when they are alcohol-free in their blood. People who drink a great deal sometimes fall into a deep sleep. Later, they may wake up with a strong headache.
In addition to these nonprescription drugs, there are two major categories of prescription drugs: stimulants and depressants. The depressants include morphine(吗啡), which is used as a pain killer. The most common stimulants are amphetamines (苯丙胺). Doctors used to prescribe amphetamines as diet pills; however, they found that amphetamines can have serious side effects. They can make a patient very nervous, and when the drug wears off, the patient may feel very depressed. Doctors still give amphetamines to people with narcolepsy, an illness that causes sudden, uncontrollable attacks of sleep.
The largest class of illegal drugs are hallucinogens, drugs that change the way a person thinks and cause hallucinations, or visions. For some people, marijuana(大麻) is a mild hallucinogen. Marijuana generally brings a pleasant feeling. However, when people smoke marijuana, they sometimes can not concentrate very well on their activities, such as their work or driving. [br] What is the meaning of "alcohol-free" ?
选项
答案
Without alcohol or no alcohol
解析
就文章词或短语的同义提问,我们在前面已经见过。做这类题需要分两步布骤:首先确定词义,从生词前后,甚至整段中归纳出答案来。其次,正确地解释词义。解释词义往往比确定词义要困难。因为不少考生对问义的理解往往是心里明白,但说不出来,或者说不能用精练的语言说出来。
转载请注明原文地址:https://tihaiku.com/zcyy/2861190.html
相关试题推荐
[originaltext]M:SomeonejustcalledaskingforMargaret.W:Don’tthepersonlea
[originaltext]M:SomeonejustcalledaskingforMargaret.W:Don’tthepersonlea
[originaltext]M:SomeonejustcalledaskingforMargaret.W:Don’tthepersonlea
[originaltext]M:SomeonejustcalledaskingforMargaret.W:Don’tthepersonlea
Recently,astudentusedhisPersonalDigitalAssistant(PDA)tofilmafema
Recently,astudentusedhisPersonalDigitalAssistant(PDA)tofilmafema
Recently,astudentusedhisPersonalDigitalAssistant(PDA)tofilmafema
Areyouateamperson?Areyouatyourbestaspartofasmall,tightlyunit
Areyouateamperson?Areyouatyourbestaspartofasmall,tightlyunit
[originaltext]Howmuchlivingspacedoesapersonneed?Whathappenswhenh
随机试题
(1)Youshouldtreatskepticallytheloudcriesnowcomingfromcollegesand
Whendidthespeakerlearntosmoke?Thespeakerlearnstosmokeat______.[b
Itwassweetand(thought)______ofyoutothinkofit.thoughtful
组稿工作的意义有( )。A.组稿是落实选题计划的基本途径 B.组稿是保证稿源
根据下面资料,回答题 Humangrowthisaprocesso
A.急性黄疸型 B.急性无黄疸型 C.急性重型 D.慢性迁延性 E.慢性
审计人员测试现金内部控制的内容及方法有:A.审查现金截止期 B.检查财务专用章
安装时间超过()的电容器户外用高压熔断器(外熔断件)应进行更换。2年
假定某公司2015年的销售成本为50万元,销售收入为200万元,年初资产总额为1
下列说法不正确的是()。A、所有者权益是指企业资产扣除负债后由所有者享有的剩余权
最新回复
(
0
)