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A body weighs ______ from the surface of the earth.
A．less the farther it gets
B．the farther is get, the less
C．less than it gets farther
D．less than it, the farther it gets
答案
更多“A body weighs ______ from the surface of the earth.A．less the farther it getsB．the farther”相关的问题
第1题
A body weighs ______ from the surface of the Earth.
A. less the farther it gets B. the farther it gets, the less
C. less than it gets farther D. less than it, the farther it gets
第2题
Every animal is a living radiator(散热器) -- heat formed in its cells and given-off through its skin. Warm-blooded animals keep a normal temperature by continuously replacing lost surface heat; smaller animals, which have more skin for every ounce (盎司) of body weight, must produce heat faster than bigger ones. Because small animals burn fuels faster, scientists say they live faster. The speed at which an animal lives is determined by measuring the rate at which it uses oxygen (氧气). A chicken, for example, uses one-half cubic (立方的) centimeters of oxygen every hour for each gram it weighs. Because it uses oxygen eight times as fast, it is said that the mouse is living eight times as fast as the chicken. The smallest of the warm-blooded animal, the humming-bird, lives a hundred times as fast as an elephant. There is a limit to how small a warm-blooded animal can be. A bird that weighs only two and a half grams would starve to death. It would burn up its food too rapidly and would not be able to eat fast enough to supply itself more fuel.
The passage says that every animal is a living radiator because it ______.
A．produces heat in its body cells
B．burns fuel to produce heat
C．sends out heat through its skin
D．takes in oxygen for burning fuel
第3题
Obesity
Obesity refers to the medical condition characterized by storage of excess body fat. The human body naturally stores fat tissue under the skin and around organs and joints. Fat is critical for good health because it is a source of energy when the body lacks the energy necessary to sustain life processes, and it provides insulation and protection for internal organs. But too much fat in the body is associated with a variety of health problems.
Most physicians use the body mass index (BMI) to determine desirable weights. BMI is calculated as weight divided by height and people with a BMI of 27 or above are considered obese.
Weight-height tables, such as those published by the Metropolitan Life Insurance Company, are also used as general measures of desirable weight ranges3. These tables assign a range of weights for a particular height. For example, a man of 1.8 m has a desirable range of 66 to 83 kg, with an average of 75 kg. A woman who is 1.6 m has a desirable range between 53 and 70 kg, with an average of 62 kg.
The BMI and weight-height tables only provide rough estimates of desirable weights and scientists recognize that many other factors besides height affect weight. Weight alone may not be an indicator of fat, as in the case of a body-builder who may have a high BMI because of a high percentage of muscle tissue, which weighs more than fat. Likewise, a person with a sedentary lifestyle. may be within a desirable weight range but have excess fat tissue.
Obesity increases the risk of developing disease. According to some estimates, almost 70 percent of heart disease cases are linked to excess body fat, and obese people are more than twice as likely to develop high blood pressure. Obese women are at nearly twice the risk for developing breast cancer, and all obese people have an estimated 42 percent higher chance of developing colon cancer. The risk of medical complications, particularly heart disease, increases when body fat is distributed around the waist, especially in the abdomen. This type of upper body fat distribution is more common in men than in women.
The social and psychological problems experienced by obese people are also formidable. Stereotypes about "fat" people are often translated into discriminatory practices in education, employment, and social relationships. The consequences of being obese in a world where people had better be "thin" are especially severe for women, whose appearances are often judged against an ideal of exaggerated slimness.
What is obesity？
A．Obesity is having fat tissue under the skin.
B．Obesity is having fat tissue around organs.
C．Obesity is being too fat.
D．Obesity is having good health.
第4题
The Migration of the California Grey Whale
One of nature's greatest achievements is the California grey whale. At birth a grey whale calf(小仔) weighs 2,000 pounds and is fourteen feet long. Every day the calf consumes fifty gallons of the mother's milk and gains fifty pounds of weight. At maturity this whale will weigh 80,000 pounds, be fifty feet long and eat several tons of food each day. The California grey whale spends most of its sixty-year life span on the road.
Every year thousands of grey whales make the longest migration of any animal, traveling 7,000 miles each way between the Arctic(北极圈)and Baja, California. The grey whales spend the long summer days in their Arctic feeding grounds in the Bering Sea between Alaska and Russia. Unlike a fish, the whale is warm-blooded and must therefore maintain a relatively high internal body temperature. In the cold Arctic waters the grey whale is protected by an outer layer of blubber(鲸脂)which averages six inches in thickness. Other whales such as the Greenland Night whale have been found with a two-foot thick layer of blubber covering their bodies.
During these summer months in the Arctic the grey whales fatten themselves by consuming enormous quantities of small shrimp-like animals called amphipods (端足目动物). Recent observations of a young grey whale, Gigi II, held in captivity (囚禁) at Sea World in San Diego during 1971 and 1972, suggest that the grey whale feeds by sweeping its enormous head over the bottom. The amphipods on which it feeds are either stirred off the bottom or leap off the bottom to escapee. These animals and the surrounding water are sucked into the whale's mouth. As the water is expelled from the mouth, it passes through coarse baleen (鲸须) fibres. The small animals are trapped and swallowed.
In October as the days get shorter and ice begins to form. over the Arctic feeding grounds, the California grey whale begins its long journey south to the warm waters of Baja, California. During this three-month long trip the whales traveling in groups stay dose to the shore of North America, swimming both day and night and averaging about 100 miles per day.
Occasionally the whale will take a look around above the water or "skyhop". Either by beating its tail flukes (尾鳍) rapidly or by resting its tail on the bottom, the whale pushes its upper eight to ten feet of body out of the water and takes a look around. At other times the whale will leap its fifty-foot body almost clear of the water, creating a huge splash as it reenters the water. This "breaching" (跃出水面) may be to dislodge(驱逐)whale lice(虱子) or barnacles (附着甲壳动物) or possibly part of a courtship display.
During the trip south the grey whales that are sexually mature, at least three years old, and not pregnant already, form. mating groups. These groups are composed of three whales, two males and a female. The dominant male couples with the female while the second male is kept busy positioning the two whales on their sides facing each other and keeping them together during the sex act. This is no small job, since each whale can be fifty feet long and weighs forty tons.
During December and January the grey whales arrive at the warm lagoons(环礁湖)along the coast of Baja, California. The whales swim miles inland along narrow shallow channels. These channels are the breeding grounds of the California grey whale. The calf has been gestating (孕育) in the pregnant female for the last thirteen months, that is, since her last journey south. The expectant cow is aided in the birth of the calf by another female that acts as a midwife (助产士). At birth the calf sinks toward the sea floor. Being a mammal (哺乳动物) the whale must breathe at the surface. The midwife guides the baby whale to the surface for its first gulp of air. The calf then finds its mother's nipples (乳头) and rich whale milk is forced into its mouth. During the next two mont
A．Y
B．N
C．NG
第6题
听力原文：W: You definitely lost some weight. Didn't you start off weighing 190 pounds？
M: Yes, I look off 20 pounds the last month, but I gained back 5 this month.
Q: How much does the man weigh now？
(14)
A．He weighs 205 pounds.
B．He weighs 190 pounds.
C．He weighs 175 pounds.
D．He weighs 165 pounds.
第8题
Which of the following would CDC most probably recommend？
A．Health weighs more than wealth.
B．Prevention is better than cure.
C．Actions speak louder than words.
D．Better late than never.
第9题
If a woman is 1.6m tall and weighs 49 kg, she
A．is considered within the desirable weight-height range.
B．is definitely unhealthy.
C．should be considered fat.
D．should not be considered unhealthy.
第10题
Which of the following would CDC most probably recommend？
[A] Health weighs more than wealth.
[B] Prevention is better than cure.
[C] Actions speak louder than words.
[D] Better late than never.
