题目内容
听力原文： Piglets may be happy wallowing in the mud, but they get a much better start in life ff they are nurtured on a warm waterbed. Instead of snuggling up to their mothers for warmth in their cold pigsty and running the risk of being crushed—a common cause of early death—German scientists said waterbeds could be a safer alternative.
When Martin Ziron and researchers at the Institute of Animal Breeding and Genetics in Giessen, Germany tested various heating methods on 1,400 piglets during their first weeks of life, waterbeds won hands down.
"Around 99 percent of the piglets preferred warm waterbeds to any of the alternatives, spending well over half the day lounging about on them and only getting up to feed or play," New Scientist said Wednesday.
The scientists compared the number of injures, which usually occur while scrambling for a feeding position, and the weight gain of the piglets which were provided with plastic plates, foam mats waterbeds, straw or concrete. Piglets on the waterbeds had fewer injuries and gained much more weight than the animals kept on concrete.
According to the magazine, the waterbeds are made from a tough plastic membrane and can be heated from underneath by an electric mat or from above by infrared lamps.
From the passage we know that piglets ______.
查看答案
搜索结果不匹配？点我反馈
更多问题
Researchers found one sure way to stop attracting the little bugs—stop breathing. Mosquitoes can sniff out an attractive target from as far as 40 miles. When humans exhale, they expel a plume of CO(下标)2 and other odors that travel through the air. The appetizing stir is the equivalent of a dinner bell, alerting mosquitoes that a warm meal is within range,
When a mosquito is trailing an attractive target, it zigzags up the breath plume until it makes contact, landing on the skin and patiently searching for just the right spot to insert its stylet for an eight-to-ten second feeding.
Perspiration, a barely avoidable human condition, also is a mosquito lure—but only if the sweat has formed bacteria.
Bathing helps reduce the attractiveness of sticky bodies, but after-bath products don't. Skin-care products that clean, soften and moisturize not only improve a person's appearance, they're also attractive to mosquitoes. Certain medications, including heart and blood pressure medicine, also alter a person's likelihood of being bitten.
Scientists conducted the research to explore 'the tastes of mosquitoes and help humans protect themselves from mosquito-borne disease.
All of the following are causes of being bitten by mosquitoes EXCEPT ______.
SECTION B PASSAGES
Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
听力原文： In the early 1960s a new sound was heard, very different from anything, which had so far come from the American side of the Atlantic. This was the Liverpool, or northwestern "beat". Situated on the river Mersey in the northeastern comer of the industrial Blank Country, Liverpool was not a place that anyone visited for fun. Until the 1960s it was known only as one of Britain's largest ports. Then, overnight, it became world famous as the birth place of the new pop culture which, in a few years, swept across Britain and America, and most countries of the Western world.
The people responsible for the pop revolution were four Liverpool boys who called themselves The Beatles. They played in small clubs in the back streets of the city. Unlike the famous solo stars who had their songs written for them, The Beatles wrote their own words and music.
Some pop groups, in particular the Rolling Stones, did more than just entertain. They wrote words that were deliberately intended to shock. They represented the anger and bitterness of youth struggling for freedom against authority.
The Beatles finally won the affection and admiration of people of all ages and social backgrounds. Their songs became more serious. They wrote not only of love, but also of death and old age and poverty and daily life. They were respected by many intellectuals and by some serious musicians, largely thanks to The Beatles, pop music has grown into an immense and profitable industry.
Which of the following is NOT true about Liverpool？
听力原文：W: Gosh! Kevin, are you OK？ Another cup of coffee？
M: Yeah, I stayed up all night cramming for my poetry exam. I couldn't keep my eyes open in my last class. I'm having this coffee so I can stay awake this afternoon.
W: Haven't you ever heard that drinking too much coffee is harmful to your health？
M: It's a little odd. What do you mean harmful？
W: Well, for one thing it may cause heart disease.
M: Most of the research about the link between coffee and heart disease is inconclusive.
W: But coffee has caffeine that is addictive, once addicted, it's hard to kick it off.
M: Not so horrible. You can't become addicted to caffeine like other drugs.
W: Yes, you can. Don't you know that people who are deprived of caffeine suffer with draw symptoms, especially headache？
M: Oddly enough, one cure for headache is caffeine. Besides, coffee helps me work faster？
W: Studies have showed that coffee makes you work faster but not necessarily better. You may finish your exam in a shorter period but you won't have fewer errors.
M: You know, soda in your drink has caffeine too.
W: But 12 ounces of soda has half the caffeine of a 5 ounces cup of coffee. And a cup of tea has less than that.
M: But I cannot resist the taste of coffee.
W: You could drink decal Decaffeinated coffee doesn't have as much flavor or body as regular coffee.
What is the conversation mainly about？
SECTION A CONVERSATIONS
Directions: In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow.
听力原文：M: I think intermarriage is a good idea. We get so many different races living together peacefully.
W: Personally, I feel that it's not a very sound idea. It's difficult for two persons of entirely different religions to share a life together. They will face lots of problems.
M: Of course there'll be problems. Even two persons of the same religion have problems, except that it will be slightly less difficult.
W: I agree with you, Henry. Naturally, there'll be arguments and personal differences. A couple will have to learn to adapt to each other's customs and traditions.
M: That's right. Married people should be more tolerant towards each other and their traditions. Only then can understanding and acceptance be achieved finally.
W: You talk as if it were very simple. It isn't, you know, as I'm a child of a mixed marriage.
M: Why is it not such a good idea？
W: It's only after marriage that the vast differences in the cultures begin to show. Little things, from food and clothes to bigger aspects like religious beliefs, tend to clash. This will be either personal pride or the reluctance to accept the other's views. It may lead to a big gap between the parents, and children may suffer in between.
M: You have a point there, but I can also tell you of several such couples who are living happily together,
W: I suppose that you're right. Intermarriage can lead to happiness or sorrow, depending on how it's handled.
Which word may best describe the two speakers' positions on intermarriage？
微信支付 
支付宝支付