Hard work and lack of sleep have _____ her beauty and youth in recent years.
A. worn out B. tried out C. made out D. sent out
高二英语单项填空中等难度题
Hard work and lack of sleep have _____ her beauty and youth in recent years.
A. worn out B. tried out C. made out D. sent out
高二英语单项填空中等难度题查看答案及解析
Many effects of a lack of sleep, such as being bad-tempered and not working at your best, are well known.1.Regular poor sleep puts you at risk of serious medical conditions,including obesity and heart disease, and it shortens your life expectancy.
How much sleep do we need?
2.But some need more and some less. What matters is that you find out how much sleep you need and then try to achieve it. As a general rule, if you wake up tired and spend the daylonging for a chance to have a nap, it's likely that you're not getting enough sleep.
3.
An occasional night without sleep makes you feel tired and irritable( 急躁易怒 ) the next day,but it won't harm your health. After several sleepless nights, the mental effects become more serious. Your brain will- fog, making it difficult to concentrate and make decisions. 4.
How to catch up on lost sleep?
If you don't get enough sleep, there's only one way to compensate (补偿) —getting more sleep.
5.If you've had months of limited sleep, you'll have built up a big sleep debt, so expect recovery to take several weeks.
Starting on a weekend, try to add on an extra hour or two of sleep a night. The way to do this is to go to bed when you’re tired and allow your body to wake you in the morning (no alarm clocks allowed!).
A. What happens if we don't sleep?
B. Why is a good sleep vital for a long life?
C. It won't happen with a single early night.
D. If it continues, lack of sleep can affect your overall health.
E. However, the cost of all those sleepless nights is more than those.
F. It's now clear that a solid night's sleep is essential for a long and healthy life.
G. Most of us need around 8 hours of good-quality sleep a night to function properly.
高二英语七选五困难题查看答案及解析
Though ________ experience, he soon got a higher pay by working hard.
A. lacked B. lacking of C. lacking D. lacked in
高二英语单项填空简单题查看答案及解析
Li Hua and Wang Hai are two students of Senior Three. 1. of them work hard but they have various learning methods.
Li Hua listens to her teachers 2. (attentive) and asks her teacher 3. help as soon as possible if she has some problems. Because of this, she spends less time 4. (do) her homework, so it is 5. (certainly) that she can keep energetic in the day. However, Wang Hai has quite a 6. (difference) way of learning 7. (compare) to Li Hua. He likes to sit up late at night doing his homework, so he often feels sleepy in class. As a result, he misses lots of key points, 8. makes it difficult for him 9. (concentrate) on what he is doing.
In my opinion, Li Hua learns more effectively in class and has more free time to enjoy herself. So I prefer 10. (she) learning method.
高二英语语法填空中等难度题查看答案及解析
Li Hua and Wang Hai are two students of Senior Three. 1. of them work hard but they have various learning methods.
Li Hua listens to her teachers 2. (attentive) and asks her teacher 3. help as soon as possible if she has some problems. Because of this, she spends less time 4. (do) her homework, so it is 5. (certainly) that she can keep energetic in the day. However, Wang Hai has quite a 6. (difference) way of learning 7. (compare) to Li Hua. He likes to sit up late at night doing his homework, so he often feels sleepy in class. As a result, he misses lots of key points, 8. makes it difficult for him 9. (concentrate) on what he is doing.
In my opinion, Li Hua learns more effectively in class and has more free time to enjoy herself. So I prefer 10. (she) learning method.
高二英语语法填空中等难度题查看答案及解析
The achievements we have made are largely ___ the hard work of our parents and teachers.
A. thanks for B. resulting in C. leading to D. due to
高二英语单项填空中等难度题查看答案及解析
I’ve often wondered how exactly sleep, or lack of it, can have such an awful effect on our bodies and, guess what, how much we sleep switches good genes(基因) on and had genes off.
In the first half of 2013, the Sleep Research Centre at the University of Surrey found a direct link between hours spent sleeping and genes. Every cell in our bodies carries genetic instructions in our DNA that act as a kind of operating handbook. However, each cell only “reads” the part of this handbook it needs at any given moment.
Can sleep affect how a gene reads instructions? It’s a question asked by Professor Derk-Jan Dijk at the University of Surrey. He set up an experiment and asked his volunteers to spend a week sleeping around seven and a half hours to eight hours a night and the next sleeping six and a half to seven hours.
Blood samples were taken each week to compare which genes in blood cells were being used during the long and short nights. The results were rather surprising. Several hundred genes changed in the amount they were being used, including some that are linked to heart disease, cancer, and Type 2 diabetes. Genes to do with cell repair and replacement were used much less.
Sleep restriction(six and a half to seven hours a night) changed 380 genes. Of these, 220 genes were down regulated (their power was increased). Those affected included body-clock genes which are linked to diabetes(糖尿病). One of the most downgraded genes is that which has a role in controlling insulin(胰岛素) and is linked to diabetes and insomnia(失眠). The most upgraded gene is linked to heart disease.
So changing sleep by tiny amounts can upgrade or downgrade genes that can influence our health and the diseases we suffer from when we sleep too little.
The important message is that getting close to eight hours of sleep a night can make a dramatic difference to our health in just a few days through the way it looks after our genes.
1.What kind of relation is directly discussed in the passage?
A. Sleeping hours and changes of genes.
B. Sleeping hours and diseases.
C. Changes of genes and diseases.
D. Genes and health.
2.What can we learn about Professor Derk-Jan Kijk’s experiment?
A. The experiment was carried out to find the answer to how genes affect sleep.
B. The experiment took a period of more than two weeks to reach a conclusion.
C. His volunteers were divided into two groups with two different sleeping patterns.
D. Blood samples of the volunteers were checked afterwards to decide how many genes changed in sleeping.
3.Which of the following may be concluded from the passage?
A. The experiment was performed at the University of Surrey in early 2013.
B. Body-clock genes are associated with heart disease, cancer and Type 2 diabetes.
C. Sleep restrictions may contribute to disease like diabetes, insomnia, and heart disease.
D. 7.5－8 hours’ sleep pattern makes little difference compared with 6.5－7 hours’ sleep pattern.
4.Which of the following can be inferred from the findings of the sleep research?
A. When there is a sleep restriction, genes to do with cell repair and replacement function less.
B. In a sleep, several hundred genes change in the amount. The more changes, the worse results.
C. When genes are up regulated, they do good to health; when genes are down regulated , they do harm to health.
D. Eight hours of sleep a day can be beneficial to our health in that it looks after our genes.
高二英语阅读理解中等难度题查看答案及解析
Though lacking the necessary working experience, my cousin got the job____ her confidence and flexibility.
A. in terms of B. with respect to
C. in response to D. on account of
高二英语单项填空中等难度题查看答案及解析
You will _______ your health if you work so hard，eat a little food and sleep badly．
A．fail B．improve C．help D．endanger
高二英语单项填空中等难度题查看答案及解析
Susan was determined to work hard at her lessons this term to ________ the expectations of her parents.
A. live up to B. come up to
C. get down to D. look forward to
高二英语单项填空简单题查看答案及解析