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Fifty volunteers were alphabetically divided into two equal groups. Group A is to partic

ipate in a 7-week exercise program and Group B is to avoid planned exercise of any sort during those 7 weeks. On the day before the exercise program began, all 50 men participated in a step-test. This consisted of stepping up and down on a 16-inch bench, at 30 steps a minute for 5 minutes. One minute after completion of the step-test, the pulse rate of each subject (被测试者 ) was taken and recorded. This served as the pretest for the experiment. For the next 7 weeks, subjects in Group A rode an Exercycle (机器脚踏车 ) for 15 minutes each day, while Group B remained doing no planned exercises.At the end of the 7 weeks, the step-test was again given to both groups of subjects, and their pulses taken. The post-exercise pulse rates of subjects in the experimental were found to have decreased an average of 30 heart beats per minutes, with the lowest decrease 28 and the highest decrease 46. The pulse rates of subjects in the control group remained the same or changed no more than 4 beats, with an average difference between the initial and final tests of zero.

1).The step-test was given ()

A、after each exercise period

B、at the beginning and at the end of the seven week period

C、only once, at the beginning of the seven week period

D、twice to the men in Group A and once to the men in Group B

2).The post-exercise pulse rates of Group B were found on the average to have ()

A、not changed

B、gone down 28 beats per minute

C、gone down 30 beats per minute?

D、gone down 4 beats per minute

3).How many people were in each group? ()

A、100

B、50

C、25

D、15

4).What did Group A in their program? They ()every day.

A、stepped up and down on a bench

B、pushed and pulled on exercise handles

C、rode on an Exercycle

D、refrained from any exercise

5).When was pulse taken? ()

A、After every exercise period

B、Every day

C、Every time the ratio of active riding was increased

D、After the step-test

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更多“Fifty volunteers were alphabetically divided into two equal groups. Group A is to partic”相关的问题

第1题

It is impossible to find out exactly how many volunteers are at work today in the United S
tates. Thirty-seven million or so are known to belong to organizations like the Pink Ladies, Travelers' Aid, or Big Brothers; but those who work alone or in small informal groups cannot be counted. The total number of men and women who give their time to help others appears to be between fifty and sixty-eight million.

Volunteers start community projects too small to attract the attention of organized agencies, or work at jobs for which no funds are available. A handful of city folk will turn an empty lot into a playground for the children of their neighborhood; others decide to repair and paint a few dilapidated houses in their street. Somewhere else women cook and deliver two hot meals a day to elderly people living alone, and too sick or too tired to prepare their own food. Another group calls lonely old people once a day to chat a little and find out if they are all right. Some college students teach English, mathematics, or drawing to the inmates of a local jail. Young men and women spend part of their weekends collecting empty cans and bottles for the recycling center of their community, and some children pick up the trash left on the beach by the crowd of a summer holiday. Anywhere one looks, the army of volunteers is hard at work—not Only in the United States, but also in many other countries where volunteerism is spreading.

Fifteen years ago, the typical volunteer was a married woman between twenty-five and forty-five, who had children in school and time on her hands. She was rather well educated, with a high-school or a college degree, and she didn't need to earn a salary. She was therefore free to devote her time and talents to those who seemed to need them. Some women volunteered out of boredom, because they needed to find an occupation outside their house. But the great majority were prompted only by the desire to relieve some distress, to be useful. There have always been such women ready to give of themselves unselfishly and quietly. At the beginning of the American Civil War, around 1846, a schoolteacher named Clara Barton undertook to deliver to wounded soldiers all sorts of supplies-food, clothes, tobacco, and even medicine—that they could not get easily. She paid for these out of her own money at first, and later from the funds that she could collect from other generous people. She also ventured on the battlefields, during or after battles, to help the wounded and the dying. After the war, the government asked her to help search for missing soldiers. She helped later in other wars in Europe and attracted a number of women willing to share her work. The group grew and eventually became the American Red Cross, which now counts about 1,140,000 volunteers, with a budget of eighty-two million dollars, all from voluntary contributions.

Another pioneer of the same period, Dorothea Dix, fought to improve the living conditions in the hospitals for the mentally iii, which were not well run at the time. Her efforts finally caused state governments to take financial responsibility for these institutions. Many organizations have been launched by a determined group of volunteers, from the Boy Scouts and Girl Scouts of America to the Sierra Club, devoted to the protection of nature, and to the Gray Panthers, who fight discrimination against the elderly and try to keep them active, happy, and politically important by encouraging them to vote.

According to the passage, all the following statements are true EXCEPT______.

A.the exact number of volunteers in America is difficult to find out

B.there are thirty-seven million volunteers at work in the United States

C.American Red Cross counts about 1,140,000 volunteers with a large budget

D.the total number of volunteers in America ranges from fifty to sixty-eight million

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第2题

A small percentage of the grain ______ ruined by the prolonged rain. A. was B. wer

A small percentage of the grain ______ ruined by the prolonged rain.

A. was

B. were

C. is

D. are

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第3题

According to the passage, a pair of pandas is to be sent to the USA after______.A.they wer

According to the passage, a pair of pandas is to be sent to the USA after______.

A.they were born in the city of Chengdu

B.they were caught in Sichuan Province

C.the USA paid $ 4 million to China

D.three year's discussion of the two cities

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第4题

Before the scandal at Ahold, the executive bonuses in Dutch companies _____.[A] wer

Before the scandal at Ahold, the executive bonuses in Dutch companies _____.

[A] were higher than what Moberg earned

[B] were regulated by a commission

[C] were not monitored by the government

[D] were not set by corporate management

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第5题

How many volunteers are tested by VaxGen's vaccine?A.2546B.12000C.2500D.211

How many volunteers are tested by VaxGen's vaccine?

A.2546

B.12000

C.2500

D.211

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第6题

Are there () volunteers for a try?

A. a

B. some

C. any

D. much

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第7题

The best title for the passage may be______.A.Volunteers in the United StatesB.How Volunte

The best title for the passage may be______.

A.Volunteers in the United States

B.How Volunteers Work in the United States

C.The Growth of Volunteers in the United States

D.Volunteers from the Boy Scouts and Girl Scouts

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第8题

The most probable reason for the people to become volunteers is that______.A.they voluntee

The most probable reason for the people to become volunteers is that______.

A.they volunteer out of boredom

B.they want to be useful for others

C.they can collect money from the generous

D.they fight to improve people's living conditions

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第9题

______of the young men in our village find odd jobs in the city. A. Half B. Fifty pe

______of the young men in our village find odd jobs in the city.

A. Half

B. Fifty percent

C. Two fifths

D. All the above

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第10题

______our soccer team plays fifty games a year.A.So farB.On averageC.By and largeD.By all

______our soccer team plays fifty games a year.

A.So far

B.On average

C.By and large

D.By all means

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第11题

An investigation was made into the accident, ______ fifty people were killed.A.for thatB.w

An investigation was made into the accident, ______ fifty people were killed.

A.for that

B.when

C.where

D.in which

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