_________to nuclear radiation, even for a sho...

_____ to nuclear radiation, even for a short time, may produce variants (变异体) of genes in human bodies.

A. Exposed　　 　　　　 B. Being exposed

C. Having exposed　 D. After being exposed

高二英语单项填空中等难度题查看答案及解析

_____ to nuclear radiation, even for a short time, may produce variants (变异体) of genes in human bodies.

A. Exposed 　　　　 　 B. Being exposed

C. Having exposed　 D. After being exposed

高二英语单项填空中等难度题查看答案及解析

_____to nuclear radiation, even for a short time , may produce variants(变异体) of genes in human bodies.

A. Being exposed　　　　　　　 B. Having expose

C. Exposed　　　　　　　　　　　 D. After being exposed

高二英语单项填空中等难度题查看答案及解析

____ to nuclear radiation, even for a short time, may produce variants of genes in human body.

高二英语单项填空简单题查看答案及解析

_________to nuclear radiation, even for a short time, may produce variants of genes in human bodies.

A. Being close　　 B. Having been closed

C. Closed　　 D. After being closed

高二英语单项填空中等难度题查看答案及解析

The group of research workers are said to ________ to the dangerous nuclear radiation while they carried out their rescue task.

A. be exposed          B. have been exposed       C. exposed       D. be exposing

高二英语单项填空简单题查看答案及解析

The fact of Madam Curuie’s_______ to the radiation for a long time ______ her poor health.

A.being exposed;contributed to   B. exposed ;led to

C.having exposed;resulted in     D.exposing; resulted in

高二英语单项填空困难题查看答案及解析

The fact of Madam Curuie’s_______ to the radiation for a long time ______ her poor health.

高二英语单项填空简单题查看答案及解析

Nuclear radiation （核辐射）has a certain mystery, partly because it cannot be detected （探测）by human senses. It can’t be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can’t detect them or sense them without a radio receiver. Similarly, we can’t sense radioactivity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.

At very high levels, radiation can kill an animal or human being at once by killing plenty of cells in important organs(器官). Even the lowest levels can do serious damage. There is no level of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be serious. This is the case when only a few cells are hit, and when they are killed at once. Your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in an unusual way. They can grow into cancer. Sometimes this does not show up for many years.

This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the knowledge of the person at the time that damage has occurred. A person can be irradiated(放射治疗) and feel fine, then die of cancer five, ten, or twenty years later as a result. A child can be born weak or easy to get serious illness as a result of radiation absorbed by its grandparents.

1.According to the passage, the danger of nuclear power lies in ________.

2.Radiation can lead to serious trouble even at the lowest level  ________.

3.What does the author want to tell us?

高二英语阅读理解简单题查看答案及解析

Getting away for a short time always seems like a great idea—until you have to pack. The rule is: pack light. Here are some tips to help you pack.

Organize Yourself

Make a list. Think of what you need from your head to your toes. When you’ve done this once, it’ll be easier next time.

Start Small

Consider buying small-size samples of shampoo, toothpaste, and other items at your local store. Make sure they are all sealed tightly.

In an emergency, you can purchase them at your destination. But remember that the time you spend buying things at your destination will reduce your visiting time.

The Clothing Dilemma

Choosing which clothes to bring is probably the hardest packing decision to make. Think once again from head to toe — hat, shirts, jeans, sneakers, etc. Once you’ve picked out what you want to bring, think carefully. Do you really need that extra pair of jeans? If so, fine. Don’t try to fool yourself. You are the one who will be left holding the bag.

Weather is an important factor in your packing. If it’s cold, you could wear a jacket, a sweater, a regular shirt, and a T-shirt. Layering up will keep you warm and it will leave more room in your bag. Roll up your casual clothes instead of folding and laying them flat. This leaves more room to pack other things, and keeps your clothes fairly wrinkle-free.

Remember how much easier it will be to carry your bag!

1.This text would be most helpful to a reader who is _______ .

A. going on a vacation　　　 B. shopping for luggage

C. moving to a new home　　 D. hosting relatives for a visit

2.If you buy things at your local store ahead of time, you can _______ .

A. lighten your load

B. save a lot of money

C. have more visiting time

D. have more room in your bag

3.What should one plan to do if going somewhere in the winter?

A. Pack an extra sweater for the trip.

B. Put on several layers of clothing.

C. Mix and match clothing outfits.

D. Roll jackets so they fit in the bag.

高二英语阅读理解中等难度题查看答案及解析