题目内容

【题目】Does school start too early? Judging from the teenagers who yawn in class, it does. And those students aren’t just lazy. Scientific studies have shown that school does start too early for young students.

According to a series of studies done across the U.S., the later classes begin, the more academic performance improves. Boys and girls naturally stay up later and sleep in later. The trend begins around age 13 or 14 and peaks between 17 and 19.The teens also need more sleep in general, so forcing them to be up early for school cuts into their sleep time as well as their sleep rhythm, making them less ready to learn during those first-period classes.

Practice is proving the science. Hundreds of school districts in the U.S. have experimented with later start times and the academic performance of students has improved as a result. A study of 9,000 high school students in three states showed that grades in science, math, English and social studies all rose when school began at 8:35 or later. What’s more, attendance(出勤)goes up and student depression goes down.

The later school starts, the better the result, too. According to a study, delaying the opening bell from 7:30 a.m. to 8:30 a.m. paid off more than delaying only until 8:00 a.m. Students who get at least eight hours of sleep, and preferably nine, perform better than those who do not, so a greater delay raises the chances of achieving those numbers.

So, it turns out morning class is just too early for students to learn chemistry equations(方程式)or study an ancient poem. If you cannot change the school schedule, adjusting your own timetable to ensure eight hours’ sleep can also help you perform better at school.

【1】If the first period class begins too early, which problems might appear among students?

a. Being in low spirits.

b. Feeling sleepy.

c. Missing lessons frequently.

d. Performing poorly in English.

e. Becoming lazy.

A. a, b, c B. b, c, d C. c, d, e D. a, b, d

【2】The writer proves “School starts too early” by ______.

A. doing survey

B. doing experiments

C. comparing statistics

D. observing students’ behaviour

【3】According to the article, students can obtain relatively enough sleep by ______.

A. changing the sleep rhythm

B. changing the opening bell

C. adjusting their own schedule

D. sleeping as late as possible

【4】It is implied in the passage that in the morning ______.

A. there should be no classes

B. students’ sleep should be guaranteed

C. there should be Chinese lessons

D. there should be no science lessons

【答案】

【1】A

【2】B

【3】C

【4】D

【解析】

试题分析:本文主要说明学校不应该开始太早,否则学生极易瞌睡,学习成绩也不高。

【1】 细节理解题。从文中第一段those students aren’t just lazy.这些学生不只是懒惰,可知e正确,从文中第二段Boys and girls naturally stay up later and sleep in later. 男孩和女孩自然熬夜到很晚,睡觉也晚。由此可知b正确,从文中第三段做的实验可以看出,What’s more, attendance(出勤)goes up and student depression goes down. 更重要的是,出勤率上升,学生抑郁情绪减少了。故a正确;从文中第二段so forcing them to be up early for school cuts into their sleep time as well as their sleep rhythm, making them less ready to learn during those first-period classes. 所以迫使他们早起上学削减他们的睡眠时间以及他们的睡眠节律,使他们不太愿意在这第一节课学习。因此他们也会频繁地错过很多课。故c正确。故选A。

【2】细节理解题。从文中第三段Practice is proving the science. Hundreds of school districts in the U.S. have experimented with later start times and the academic performance of students has improved as a result. 实践证明科学。在美国数以百计的学校已经尝试晚点开始上学,结果,学生的学习成绩有所提高。因此可知,作者为了证明“学校开学太早”通过做实验等等办法,故选B。

【3】细节分析题。根据最后一段If you cannot change the school schedule, adjusting your own timetable to ensure eight hours’ sleep can also help you perform better at school. 如果你不能改变学校的时间表,调整自己的作息时间,保证八小时睡眠也可以帮助你在学校表现得更好。
【4】细节分析题。从文章最后一段it turns out morning class is just too early for students to learn chemistry equations(方程式)or study an ancient poem.结果证明早上的课对学生们来说学习方程式或者一首古诗仅仅太早了,故可推知早上不应该有语文课或者数学这类理科性质的课,但是并没说早上不该有课,故选D。

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【题目】The current Ebola (埃博拉病毒)outbreak in western and central Africa has infected at least 3,069 people, including 1,552 dead, making it the largest outbreak in history. Ebola is a deadly virus-about 60 percent of people infected with it have died.

How is Ebola doing its harm?

When a person becomes infected with Ebola, the virus damages the body’s immune (免疫的)cells, which defend against infection, said a researcher at Lancaster University. But if a person’s immune system can stand up to this attack, then he is more likely to survive the disease.

The patients that survive it best are those who don’t get such a bad disadvantage in immune system. But if the body isn’t able to get rid of this attack, then the immune system becomes less able to regulate(调节) itself. This means the immune system is more likely to run out of control, leading to a drop in blood pressure, multi-organ failure and eventually death.

What are the common symptoms of the disease?

Fever. Headache. Joint and muscle aches. Weakness. Diarrhea. Vomiting. Stomach pain. Lack of appetite. Chills. Rash. Redness in the eyes. Hiccups. Cough. Sore throat. Chest pain. Difficult breathing or swallowing. Bleeding inside and outside of the body.

How to prevent the spread of Ebola?

Ebola can be spread primarily via direct contact with patients, specifically the blood and fluids of an infected patient.

We should avoid contact with infected patients and objects such as clothing, bedding, and needles used by them. Avoid areas where infections have been reported. For now, the disease has only been confirmed in central and West Africa, four cases in America and Europe. Avoid eating wild-caught bush meat. Researchers have suspected that the disease came to humans via animals, probably through the meat of primates(灵长类). If you’re in an area where the disease has been reported, avoid purchasing, eating, or handling wild game to stay on the safe side.

Wear protective medical clothing if you’re around infected patients. Extreme caution is necessary. Hospital workers must use masks, gloves, goggles, and gowns, which needed to be worn at all times if you’re around infected patients.

How Do People Survive Ebola?

Doctors don’t know for certain who will survive Ebola, and there is no specific treatment or cure for the disease. Although in the minority, some people do recover from infection.

Our suggestions include:

Maintain your electrolytes(电解质) and body liquid. Sports drinks can be used. Monitor your blood pressure and control it if necessary. Dropping blood pressure may be a serious sign of infection. Breathe in an oxygen-rich environment. Quickly address any symptoms of infection. Be honest about when and where you’re feeling pain.

1Ebola causes the death of a human being by .

A. attacking him with high fever B. regulating his immune system

C. damaging his immune cells D. harming all his organs directly

2What is NOT mentioned as the symptom of Ebola?

A. Fever and chills B. Swallowing difficulty

C. Lack of appetite D. High blood pressure

3In order not to be infected by Ebola, we should .

A. have the clothing of the infected cleaned

B. avoid eating wild animals like monkeys

C. not travel to Africa, America or Europe

D. stay at home without going anywhere

4It is true that .

A. a certain number of people survive Ebola

B. human has found a special cure for Ebola

C. oxygen can save infected people’s lives

D. low blood pressure is surely caused by Ebola

【题目】The planet is getting greener, and we are responsible. Carbon dioxide generated by human activities is promoting photosynthesis (光合作用) and causing a beneficial greening of the Earth’s surface.

For the first time, researchers claim to have shown that the increase in plant cover is due to this “CO2 fertilisation (肥沃化) effect” rather than other causes. However, it remains unclear whether the effect can reduce any negative effects of global warming, such as the spread of deserts.

To home in on the effect of CO2, Randall Donohue of Australia’s national research institute, the CSIRO in Canberra, monitored vegetation (植被) at the edges of deserts in Australia, southern Africa, the US Southwest, North Africa, the Middle East and central Asia. These are regions where there is plenty of warmth and sunlight, but only just enough rainfall for vegetation to grow, so any change in plant cover must be the result of a change in rainfall patterns or CO2 levels, or both.

If CO2 levels were constant, then the amount of vegetation per unit of rainfall ought to be constant, too. However, the team found that this figure rose by 11 per cent in these areas between 1982 and 2010, mirroring the rise in CO2 emissions (排放). Donohue says this lends strong support to the idea that CO2 fertilization drove the greening.

The extra plant growth could have knock-on effects on climate, Donohue says, by increasing rainfall, affecting river flows and changing the likelihood of wildfires. It will also absorb more CO2 from the air, potentially damping down (抑制) global warming but also limiting the CO2 fertilization effect itself.

Donohue cannot yet say to what extent CO2 fertilisation will affect vegetation in the coming decades. But if it proves to be significant, the future may be much greener.

【1】According to the author, the increase in plant cover _____.

A. will speed up global warming

B. results from human activities

C. will stop the spread of deserts

D. promotes the CO2 fertilization effect

【2】What does the underlined phrase “To home in on” in Para 3 probably mean?

A. To hold back. B. To cut down.

C. To improve. D. To observe.

【3】 The amount of vegetation in those monitored areas rose with _____.

A. the rise in CO2 emissions B. annual rainfall

C. the temperatures around D. the amount of sunlight

【4】What’s the best title of the text?

A. More rainfall, less CO2 emission

B. How to deal with carbon emissions

C. Positive effects of global warming

D. CO2 emission making Earth greener

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