2020年职称英语考试《卫生类》考试共65题，分为单选题和多选题和判断题和计算题和简答题和不定项。小编每天为您准备了5道每日一练题目（附答案解析），一步一步陪你备考，每一次练习的成功，都会淋漓尽致的反映在分数上。一起加油前行。

1、Driving after drinking
The legal limit for driving after drinking alcohol is 80 milligrams of alcohol in 100 millilitres of blood, when tested. But there is no sure way of telling how much you can drink before you reach this limit. It varies with each person depending on your weight, your sex, what you've just eaten and what sort of drinks you've had. Some people might reach their limit after only about three standard drinks.
In fact, your driving ability can be affected by just one or two drinks. Even if you're below the legal limit, you could still be taken to court if a police officer thinks your driving has been affected by alcohol.
It takes about an hour for the body to get rid of the alcohol in one standard drink. So, if you have a heavy drinking in the evening you might find that your driving ability is still affected the next morning, or you could even find that you're still over the legal limit. In addition, if you've had a few drinks at lunchtime, another one or two drinks in the early evening may well put you over the legal limit.
In a test with professional drivers, the more alcoholic drinks they had had, the more certain they were that they could drive a test course through a set of movable posts…and the less able they were to do it! So the only way to be sure you're safe is not to drink at all.
Alcohol is a major cause of road traffic accidents. One in three of the drivers killed in road accidents have levels of alcohol which are over the legal limit, and road accidents after drinking are the biggest cause of death among young men. More than half of the people stopped by the police to take a breath test have a blood alcohol concentration of more than twice the legal limit.
It is important to remember that driving after you've been drinking doesn't just affect you. If you're involved in an accident it affects a lot of other people as well, not least the person you might kill or injure.
You might be accused of drunk driving when____.【单选题】

A.you drive upon having some drinks

B.you become a helpless alcohol addict

C.your driving is found abnormal for drinking

D.your alcohol percentage fails the test

正确答案:C

答案解析:细节考查题。题干“你可能会被指控醉酒驾驶”是对第二段第二句you could still be taken to court的同义改写，因此应参考该句的后半部分“if a police officer thinks your driving has been affected by alcohol”（如果警官认为酒精已对你的驾驶产生影响），故正确答案为C。

2、He's spent years cultivating a knowledge of art.【单选题】

A.sharing

B.using

C.denying

D.developing

正确答案:D

答案解析:他花了多年时间学习艺术知识。本题有一定难度，重点考查的是选项的引申意义。cultivating的引申意思指“培养，陶冶”，和developing的引申意思“发展，开发”是近义词，C项指“否认”。其他三项和答案意义差异较大，干扰性不强。

3、She?gave?up?her?job?and?started?writing?poetry.【单选题】

A.lost

B.abandoned

C.took

D.created

正确答案:B

答案解析:题干大意：她放弃了工作，开始撰写诗作。句中give?up意为“放弃”，如：In?view?of?the?circumstances，we?should?give?up?the?plan.（考虑到情况的变化，我们应该放弃这项计划。）四个选项中，abandon有放弃的意思，如：After?the?age?of?about?thirty?he?abandoned?individual?ambition.（他一过30就放弃了个人的雄心壮志。）lose意为“丢失”；take意为“拿”；create意为“创造”。

4、Egypt Felled by Famine
Even ancient Egypt's mighty pyramid builders were powerless in the face of the famine that helped bring down their civilization around 2180 BC. Now evidence gleaned from mud deposited by the River Nile suggests that a shift in climate thousands of kilometers to the south was ultimately to blame and the same or worse could happen today.
The ancient Egyptians depended on the Nile's annual floods to irrigate their crops. But any change in climate that pushed the African monsoons southwards out of Ethiopia would have diminished these floods.
Dwindling rains in the Ethiopian highlands would have meant fewer plants to stablize the soil. When rain did fall it would have washed large amounts of soil into the Blue Nile and into Egypt, along with sediment from the White Nile.
The Blue Nile mud has a different isotope signature from that of the White Nile. So by analyzing isotope differences in mud deposited in the Nile Delta, Michael Krom of Leeds University worked out what proportion of sediment came from each branch of the river.
Krom reasons that during periods of drought, the amount of the Blue Nile mud in the river would be relatively high. He found that one of these periods, from 4,500 to 4,200 years ago, immediately predates the fall of the Egypt's Old Kingdom.
The weakened waters would have been catastrophic for the Egyptians. " Changes that affect food supply don't have to be very large to have a ripple effect in societies," says Bill Ryan of the Lamont Doberty Earth Observatory in New York.
"Similar events today could be even more devastating," says team member Daniel Stanley, a geoarchaeologist from the Smithsonian Institution in Washington, D C. " Anything humans do to shift the climate belts would have an even worse effect along the Nile system today because the populations have increased dramatically. "
Which of the following statements is true?
【单选题】

A.The White Nile is the trunk of the River Nile.

B.The White Nile is the trunk of the Blue Nile.

C.The White Nile is a branch of the Blue Nile.

D.The White Nile and the Blue Nile are branches of the River Nile.

正确答案:D

答案解析: D说的是：青尼罗河和白尼罗河是尼罗河的支流。第四段中的最后一句话是这么说的：… worked out what proportion of sediment came from each branch of the river. 这里的“河”是指“尼罗河”，“每条支流”是指上文所说的“青尼罗河”和“白尼罗河”。因此，D是正确的答案。A：白尼罗河是尼罗河的干流。B：白尼罗河是青尼罗河的干流。C:白尼罗河是青尼罗河的支流。显然，这些都不是答案。

5、College Night Owls Have Lower Grades
College students who are morning people tend to get better grades than those who are night owls(晚睡的人), according to University of North Texas researchers.
They had 824 undergraduate(大学本科生的) students complete a health survey that in cluded questions about sleep habits and daytime functioning, and found that students who are morning people had higher grade point averages(GPAs) than those who are night people.
"The finding that college students who are evening types have lower GPAs is a very important finding, sure to make its way into undergraduate psychology texts in the near future, along with the research showing that memory is improved by sleep," study co - author Daniet J. Taylor said in a prepared statement.
"Further, these results suggest that it might be possible to improve academic performance by using chronotherapy (时间疗法) to help students retrain their biological clock to become more morning types," Taylor said.
The research was expected to be presented Monday at SLEEP, the annual meeting of the Associated Professional (专业的) Sleep Societies, in Baltimore.
In other findings expected to be heard at the meeting, University of Colorado researchers found a significant association between insomnia (失眠) and a decline in college students' academic performance.
The study included 64 psychology, nursing and medical students, average age 27. 4 years, who were divided into two groups—low GPAs and high GPAs.
Among those with low GPAs,69.7 percent had trouble falling asleep,53.1 percent experienced leg kicks or twitches (痉挛) at night, 65.6 percent reported waking at night and having trouble falling back to sleep, and 72.7 percent had difficulty concentrating during the day.
"In college students, the complaint of difficulty concentrating during the day continues to have a considerable impact on their ability to succeed in the classroom," study author Dr. James F. Pagel said in a prepared statement. "This study showed that disordered sleep has significant harmful effects on a student's academic performance, including GPAs."
The passage indicates that chronotherapy can be used to help people to ______. 【单选题】

A.forget their troubles

B.improve their image

C.better their social relationships

D.readjust their biological clock

正确答案:D

答案解析:本题难度不大，答案依据比较明显，答案依据是文章第四段，谈到通过时间疗法可以帮助学生重新调整生物钟，变成早起型，回来看选项，D项和原文句意相符，是答案。