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
43
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
Childrentodayspendmoretimestareatcomputerand【1】______TVscreensbo
[originaltext]W:Ithoughtyouweregoingtodrivecarefullysoyouwouldn’tge
有方向性假设
28岁初孕妇,妊娠35周,自述剧烈腹痛伴发热、恶心、呕吐半日就诊。B超见子宫如孕
28岁女性,月经周期为28天,有排卵的妇女于月经周期第17天刮宫,子宫内膜镜检属
目前推荐测定血清总蛋白的方法是( )。A.溴甲酚绿法 B.双缩脲比色法 C
经卫生鄙、总后卫生部和国家中医药管理局联合发布实施的为A:抗菌药物临床应用指导原
当高频通道与载波通道混用一相时,高频或通信发生异常或需要检修时,合上耦合电容器的
(2020年真题)根据《期货交易所管理办法》,期货交易所应当监管()的期
甲公司为增值税一般纳税人,适用的所得税税率为25%,2×17年自财政部门取得以下
最新回复
(
0
)