— Do you know the reason why the Whites got d...

— Do you know the reason why the Whites got divorced?

— No, they haven’t quarreled with each other since they got married. _______, they broke up finally.

A. Somehow                B. Anyhow                           C. Anyway                           D. Somewhat

高二英语单项填空简单题查看答案及解析

Do you know the reason ________he was late for the class?

高二英语单项填空简单题查看答案及解析

Do you know that men die earlier than women? The latest research makes it known that the reason could be that men’s hearts go into rapid decline when they reach middle age.

　The largest study of the effects of ageing(变老) on the heart has found that women’s longevity may be linked to the fact that their hearts do not lose their pumping power with age.

　“We have found that the power of the male heart falls by 20-25 percent between 18 and 70 years of age,” said the head of the study, David Goldspink of Liverpool John Moores University in the UK.

　“Within the heart there are millions of cells that enable it to beat. Between the age of 20 and 70, one-third of those cells die and are not replaced in men,” said Goldspink. “This is part of the aging process.”

　What surprises scientists is that the female heart sees very little loss of these cells. A healthy 70-year-old woman’s heart could perform almost as well as a 20-year-old one’s.

　“This gender difference might just explain why women live longer than men,” said Goldspink. They studied more than 250 healthy men and women between the ages of 18 and 80, focusing on healthy persons to remove the confusing influence of disease. “The team has yet to find why ageing takes a greater loss on the male heart,” said Goldspink.

　The good news is that men can improve the health of their heart with regular exercise. Goldspink stressed that women also need regular exercise to prevent their leg muscles becoming smaller and weaker as they age.

1. The underlined word “longevity” in the second paragraph probably refers to “________”.

A．health            B．long life           C．ageing            D．effect

2. The text mainly talks about ________.

A．men’s heart cells                      B．women’s ageing process、

C．the gender difference                    D．hearts and long life

3.According to the text, the UK scientists have known that ________.

A．women have more cells than men when they are born

B．women can replace the cells that enable the heart to beat

C．the female heart loses few of the cells with age

D．women never lose their pumping power with age

4.If you want to live longer, you should ________.

A．enable your heart to beat much faster

B．find out the reason for ageing

C．exercise regularly to keep your heart healthy

D．prevent your cells from being lost

5.We can know from the passage that ________.

A．the reason why ageing takes a greater loss on the male heart has been found out

B．scientists are on the way to finding out why the male heart loses more of the cells

C．the team has done something to prevent the male from suffering the greater loss

D．women over 70 could lose more heart cells than those at the age of 20

高二英语阅读理解中等难度题查看答案及解析

Do you think the reason _______ he gave is believable?

A. which             B. why              C. what                 D. to which

高二英语单项填空中等难度题查看答案及解析

There is no reason why you shouldn’t tell the headmaster _________ that you are resigning because he has arranged your post.

A．in effect          B．in fact            C．in advance         D．in support

高二英语单项填空简单题查看答案及解析

Have you ever wondered why there are so many skin colors in the world? Do you know why people living in particular areas usually have a certain color? Biology and history are the two reasons for this.

Skin contains something called melanin, which determines a person’s skin color. The more melanin a person has, the darker his or her skin will be. The amount of and the production of melanin are controlled by genetics, but can be affected by other things, such as sunlight. If a person lives in a place with less sunlight, a person’s body will produce less melanin, making the skin lighter.

Skin color is also affected by another source ---- vitamin D. humans all need vitamin D to build bones. People can get it by eating foods such as fish and milk, or from sunlight, so sunlight absorbed by melanin cannot be used for vitamin D production. Therefore, a dark—skinned person will produce less vitamin D than a light—skinned person when they received the same amount of sunlight.

The connection between vitamin D production and skin color is clear when we look at evolution. The earliest humans lived in Africa, their dark skin produced less vitamin D because of their dark skin. As a result, their skin made less melanin, so they could get enough sunlight to produce vitamin D. their skin gradually got lighter and they lost hair. Now, people living in areas with strong sunlight like Africa, have darker skin, while people living in other areas have lighter skin. The exception to this is the Inuit, who live in a place with little sunlight, but have dark skin because they eat a lot of fish and have enough vitamin D.

Evolution has given us a rainbow of skin colors. Humans have always had melanin to determine our skin color. What has changed through history is the environment where we have lived. This has in turn changed our melanin production, and eventually, skin color.

高二英语其他题中等难度题查看答案及解析

Have you ever wondered why there are so many skin colors in the world? Do you know why people living in particular areas usually have a certain color? Biology and history are the two reasons for this.

Skin contains something called melanin, which determines a person’s skin color. The more melanin a person has, the darker his or her skin will be. The amount of and the production of melanin are controlled by genetics, but can be affected by other things, such as sunlight. If a person lives in a place with less sunlight, a person’s body will produce less melanin, making the skin lighter.

Skin color is also affected by another source ---- vitamin D. humans all need vitamin D to build bones. People can get it by eating foods such as fish and milk, or from sunlight, so sunlight absorbed by melanin cannot be used for vitamin D production. Therefore, a dark—skinned person will produce less vitamin D than a light—skinned person when they received the same amount of sunlight.

The connection between vitamin D production and skin color is clear when we look at evolution. The earliest humans lived in Africa, their dark skin produced less vitamin D because of their dark skin. As a result, their skin made less melanin, so they could get enough sunlight to produce vitamin D. their skin gradually got lighter and they lost hair. Now, people living in areas with strong sunlight like Africa, have darker skin, while people living in other areas have lighter skin. The exception to this is the Inuit, who live in a place with little sunlight, but have dark skin because they eat a lot of fish and have enough vitamin D.

Evolution has given us a rainbow of skin colors. Humans have always had melanin to determine our skin color. What has changed through history is the environment where we have lived. This has in turn changed our melanin production, and eventually, skin color.

高二英语阅读理解中等难度题查看答案及解析

Why do some people live to be older than others?You know the standard explanations: keeping a moderate diet, engaging in regular exercise,etc.But what effect does your personality have on your longevity?Do some kinds of personalities lead to longer lives?A new study in the Journal of the American Geriatrics Society looked at this question by examining the personality characteristics of 246 children of people who had lived to be at least 100.

The study shows that those living the longest are more outgoing,more active and less neurotic (神经质的) than other people.Long-living women are also more likely to be sympathetic and cooperative than women with a normal life span.These findings are in agreement with what you would expect from the evolutionary theory: those who like to make friends and help others can gather enough resources to make it through tough times.

Interestingly,however,other characteristics that you might consider advantageous had no impact on whether study participants were likely to live longer.Those who were more self-disciplined,for instance,were no more likely to live to be very old.Also,being open to new ideas had no relationship to long life,which might explain all those bad-tempered old people who are fixed in their ways.

Whether you can successfully change your personality as an adult is the subject of a longstanding psychological debate.But the new paper suggests that if you want long life,you should strive to be as outgoing as possible.

Unfortunately,another recent study shows that your mother’s personality may also help determine your longevity.That study looked at nearly 28,000 Norwegian mothers and found that those moms who were more anxious,depressed and angry were more likely to feed their kids unhealthy diets.Patterns of childhood eating can be hard to break when we’re adults,which may mean that kids of depressed moms end up dying younger.

Personality isn’t destiny(命运),and everyone knows that individuals can learn to change.But both studies show that long life isn’t just a matter of your physical health but of your mental health.

1.What finding of the study might prove somewhat out of our expectation？

A. Helpful people can live a relatively long life.

B. Readiness to accept new ideas offer more possibility to enjoy longevity.

C. Being self-discipline makes no difference to longevity.

D. Personality characteristics that prove advantageous actually vary with times.

2.According to the author,outgoing and sympathctic people _______.

A. have a good understanding of evolution.　　 B. are more likely to recover from hardship.

C. are probably more active and neurotic.　　 D. generally appear more resourceful.

3.What does the recent study of Norwegian mothers show？

A. Children’s personality characteristics are always shared by their mothers.

B. People with unhealthy eating habits are likely to die at a young age.

C. Mothers’ may have a longer influence on children than fathers’.

D. Mothers’ ancient may affect their children’s life spans.

4.What can we learn from the findings of the two new studies？

A. A mixture of mental and physical health produces longevity.

B. A person’s lifestyle is largely related to his or her health.

C. Personality plays a decisive and significant role in how healthy one is.

D. Anxiety and depression more often than not cut short one’s life span.

高二英语阅读理解困难题查看答案及解析

. ---Why do you say that the doctor is in a _______?

---Because he doesn’t know whether to tell the patient the truth or not.

A. procedure   B. dilemma     C. barrier       D. interval

高二英语单项填空简单题查看答案及解析

It is easier to float in the ocean than it is to float in a swimming pool. Do you know why?

Ocean water is full of salt— and salt water can hold up more weigh than fresh water. See for yourself!

You Will Need:

● 3 cups of warm water

● Measuring cup (量杯)

● Wide-mouthed jar

● Salt

● Spoon

● Raw (生的)potato

You Will Do:

1. Pour 1.5 cups of warm water into the jar.

2. Add 1/3 cup of salt.

3. Stir(搅拌) until the salt is completely dissolved.

4. Add another 1.5 cups of water. Pour it slowly over the back of the spoon into the jar so that the two liquid will not mix together.

5. Gently place the potato into the jar. Do not drop it.

What Will Happen:

The potato will sink— but only halfway!

Why?

Salt water is heavier than fresh water, so it will stay on the bottom. The fresh water will remain on top.

The potato is heavier than the fresh water, but it is lighter than the salt water. That is why the potato will sink halfway down.

1.In the experiment, what should you do right after you pour the water over the spoon?

A．Add the salt to the water.                 B．Stir the salt into the water.

C．Place the potato in the jar.                 D．Pour warm water into thejar.

2.In Step 4 of the experiment, why do you pour the water over the spoon “slowly”?

A．It is easier to see what you are doing.

B．It pushes the fresh water to the bottom.

C．It will keep the water from coming out.

D．It will keep the liquids from mixing together.

3.In which step of the experiment do you add the salt?

A．Step 1            B．Step 2            C．Step 3            D．Step 4

4.What does the underlined word “gently” mean?

A．Carefully          B．Quickly           C．Secretly           D．Silently

高二英语单项填空中等难度题查看答案及解析