Most people do not think of fishes and other sea animals as having voices, and of those who are aware of the fact that many of them can "speak", few understand that these "conversations" have significance. Actually, their talk may be as meaningful as much of our own. For example, some sea animals use their "voices" to locate their food in the ocean expanses (广阔的区域); others use their "voices" to let their fellows know of their locations; and still others, as a means of obtaining mates. Sometimes, "speaking" may even mean the difference between life and death to a sea animal. It appears in some cases that when a predator (食肉动物) approaches, the prey (被捕食的动物) depends on no more than the sounds it makes to escape.
Fish sounds are important to man, also. By listening to them, he can learn a great deal about the habits of creatures that make them, the size of the school they form, the patterns of their migrations, and the nature of the environments in which they live. He can also apply this information to the more effective utilization of the listening spots he has set up to detect enemy submarines (潜水艇). A knowledge of fish sounds can avoid confusion and unneeded effort when a "new" sound is picked up and the sound sentry (哨兵) must decide whether or not to call an alarm.

The last sentence means that a knowledge of fish sounds can help man to （　）

A:avoid confusion in fishing activity B:avoid unneeded effort in fish sound studies C:detect enemy submarines D:pick up new sounds

Most people do not think of fishes and other sea animals as having voices, and of those who are aware of the fact that many of them can "speak", few understand that these "conversations" have significance. Actually, their talk may be as meaningful as much of our own. For example, some sea animals use their "voices" to locate their food in the ocean expanses (广阔的区域); others use their "voices" to let their fellows know of their locations; and still others, as a means of obtaining mates. Sometimes, "speaking" may even mean the difference between life and death to a sea animal. It appears in some cases that when a predator (食肉动物) approaches, the prey (被捕的动物) depends on no more than the sounds it makes to escape.
Fish sounds are important to man, also. By listening to them, he can learn a great deal about the habits of creatures that make them, the size of the School they form, the patterns of their migrations, and the nature of the environments in which they live. He can also apply this information to the more effective utilization of the listening spots he has set up to detect enemy submarines (潜水艇). A knowledge of fish sounds can avoid confusion and unneeded effort when a "new" sound is picked up and the sound sentry (哨兵) must decide whether or not to call an alarm.
The last sentence means that a knowledge of fish sounds can help man to ______.

A:avoid confusion in fishing activity B:avoid unneeded effort in fish sound studies C:detect enemy submarines D:pick up new sounds

Some people are lucky enough to be born with a good sense of direction and even if they have only visited a place once, they will be able to find it again years later. I am one of those unfortunate people who have an extremely poor sense of direction and I may have visited a place time after time, but I still manage to get lost on my way there.
When I was a teenager, I was so shy that I never dared ask complete strangers the way and so I used to wander round in circles and hope that some miraculous (奇迹的) chance would bring me to the spot I was heading for.
A lot of people do not like to admit that they do not know their hometown and will insist on telling you the way even if they do not know it; others, who are anxious to prove that they know their home town very well, will give you a long list of directions which you cannot possibly hope to remember; and you finally find that you are going in the opposite direction to that in which you should be going.
If anyone ever asks me the way somewhere, I always tell them that I am a stranger to the town in order to avoid causing trouble, but even this can have unpleasant results.
I was once on my way to work when I was stopped by a man who asked me if I would di- rect him to the Sunlight Building. Without hesitation, I gave my usual reply, but I had only walked on a few steps when I realized that he had asked for directions to my office building. However, at this point, I decided it was too late to turn back and search him out of the crowd behind me as I had and appointment to keep at the office with a new client and I did not want to keep him waiting. Imagine my situation when my secretary showed in the very man who had asked for directions to my office and his astonishment when he recognized me as the person he had asked!
The writer failed to______ the stranger who was going to his office.

A:help B:avoid meeting C:recognize D:do any business

B

The writer failed to______ the stranger who was going to his office.

A:help B:avoid meeting C:recognize D:do any business

Most people do not think of fishes and other sea animals as having voices, and of those who are aware of the fact that many of them can "speak", few understand that these "conversations" have significance. Actually, their talk may be as meaningful as much of our own. For example, some sea animals use their "voices" to locate their food in the ocean expanses (广阔的区域); others use their "voices" to let their fellows know of their locations; and still others, as a means of obtaining mates. Sometimes, "speaking" may even mean the difference between life and death to a sea animal. It appears in some cases that when a predator (食肉动物) approaches, the prey (被捕的动物) depends on no more than the sounds it makes to escape.
Fish sounds are important to man, also. By listening to them, he can learn a great deal about the habits of creatures that make them, the size of the School they form, the patterns of their migrations, and the nature of the environments in which they live. He can also apply this information to the more effective utilization of the listening spots he has set up to detect enemy submarines (潜水艇). A knowledge of fish sounds can avoid confusion and unneeded effort when a "new" sound is picked up and the sound sentry (哨兵) must decide whether or not to call an alarm.

The last sentence means that a knowledge of fish sounds can help man to （）

A:avoid confusion in fishing activity B:avoid unneeded effort in fish sound studies C:detect enemy submarines D:pick up new sounds

H5N1 avian influence, known commonly as bird flu, has killed at least 15 people across Asia and was confirmed in China on January 27. No human cases have been found in the mainland, but 13 of the country’s 31 provinces, autonomous regions, and municipalities (直辖市) have reported the disease in poultry.
The Chinese government has taken measures to prevent and control the disease. Poultry within 3 km of infected farms is to be killed and those within 5 km to receive vaccines (疫苗). (84)Meanwhile , there will be constant monitoring and daily reports on the disease across the country, and increased production of bird flu vaccines.
Among the Asian countries and regions affected by bird flue in animals, only Vietnam and Thailand have reported human cases. The people infected were reported to have caught the disease from poultry, while the World Health Organization (WHO) said there is "no proof of human-to-human transmission(传播)" of bird flue.
(85)The big fear is that the disease could combine with a human influenza virus to create a deadly new disease that will kill millions of people across the globe.
Many Asian farmers live closely with their animals and sell live chickens in the market. This greatly increases the possibility of human beings infected with bird flu.
A spokesman of the WHO said that Asian countries affected by bird flu should introduce a more healthy way of raising and selling chickens. And the people there have to complexly change their lifestyle and attitude towards animals. Here are some safety measures for people to stay healthy;
Keep fit and well through regular exercise;
Avoid infected poultry and infected people;
Avoid eating raw or under-done poultry and eggs;
Make sure there is always fresh air in your home;
Cover your mouth and nose when coughing or sneezing;
Wash your hands frequently;
Which must be wrong for the Asians to change their lifestyle

A:Farmers should avoid selling live poultry in the market B:Farmers should vaccinate their poultry regularly C:Farmers should live more closely with their poultry. D:People should avoid buying live poultry in the market.

It’s most important to wash your hands frequently and well - 20 seconds with soap and water -and avoid touching your eyes and nose. Alcohol - based hand gels are also effective. Second, to avoid spreading germs, cover your mouth when you cough or sneeze, preferably using your sleeve or a tissue. And third, if you’re sick or your child is sick, stay home until the fever has gone away for at least 24 hours without the use of fever - reducing medication.
People can avoid spreading germs by

A:washing hands frequently and well. B:covering mouth when they cough or sneeze. C:staying away from the population. D:avoid touching eyes and nose after hand washing.

It’s most important to wash your hands frequently and well - 20 seconds with soap and water -and avoid touching your eyes and nose. Alcohol - based hand gels are also effective. Second, to avoid spreading germs, cover your mouth when you cough or sneeze, preferably using your sleeve or a tissue. And third, if you’re sick or your child is sick, stay home until the fever has gone away for at least 24 hours without the use of fever - reducing medication.
People can avoid spreading germs by

A:washing hands frequently and well. B:covering mouth when they cough or sneeze. C:staying away from the population. D:avoid touching eyes and nose after hand washin

In recent years, there has been an increased awareness of the importance of protecting the environment. The three Rs to keep in mind for a cleaner environment are: reduce, reuse, and recycle.
First, reduce how much you use. It means shopping with the environment in mind. Consider the environmental impact of each product before you buy it. Make a list of what you need before you go shopping; this will reduce impulse buying. Buy in bulk - its cheaper and eliminates small containers and excess packaging. Besides, bulk merchandise may be shared with friends or neighbors. You should also avoid buying things that can’t by recycled.
A shopping list can help

A:find cheaper items. B:reduce impulsive buying. C:eliminate small containers. D:avoid excess packagin