一般来说，有高阶误码则会有（），反之，有低阶误码不一定有（）。

教育目的制定的基本依据是个体本位论。()

阅读理解。

     America is a country on the move. In unheard of number, people of all ages are exercising their way to

better health. According to the latest figures, 59 percent of American adults exercise regularly-up 12 percent

from just two years ago and more than double the figure of 25 years ago. Even non-exercisers believe they

would be more attractive and confident if they were more attractive.

     It is hard not to get the message. The advantage of physical fitness are shown on magazine covers, postage

stamps, and television ads for everything from beauty soaps to travel books. Exercise as a part of daily life did

not catch on until the 1960s when research by military doctors began to show the health benefits of doing

regular physical exercises. Growing publicity for races held in American cities helped increase a strong interest

in the ancient sport of running. Although running has leveled off in recent years as Americans have discovered

equally rewarding-and something safer-forms of exercise, such as walking and swimming, running remains the

most popular form of exercise.

     As the popularity of exercise continues to increase, so does scientific evidence of its health benefits. The

key to fitness is exercising the major muscle group strongly enough to double the heart rate and keep it doubled

for 20 to 30 minutes at a time. Doing such physical exercises three times or more a week will produce

considerable improvements in physical health in about three months.

1. According to the passage, what was the percentage of American adults doing regular physical exercises

    two years ago? [ ]

A. About 70%

B. Nearly 60%

C. More than 12%

D. Almost 50%

2. Sports in daily life began to become popular as _____. [ ]

A. people got the message from magazine covers and postage stamps

B. Scientific evidence of health benefits was shown on TV ads

C. research showed their health benefits

D. an increasing number of races were held in American cities

3. The author's purpose in writing the last paragraph is chiefly to show us _____. [ ]

A. that running stopped increasing in popularity

B. the increase of scientific evidence of advantages of exercising

C. that people have found other ways of exercising besides running

D. about how to improve physical fitness

4. Which of the following would be the best title for this passage? [ ]

A. Different Forms of Exercise.

B. Scientific Evidence of Health Benefits.

C. Exercise-the Road to Health

D. Running-a Popular Form of Sports

5岁幼儿，进食蚕豆后突感发热、恶心、呕吐、腹痛，皮肤黄染。检验：HGB60g／L，WBC8．8×10⁹／L，PLT130×10⁹／L，尿常规：隐血（+++），蛋白（+++）。G6PD活性4．4IU／gHb。最可能病因是（）

A.急性食物中毒

B.急性肾盂肾炎

C.G6PD缺乏

D.脾功能亢进

E.急性白血病

凭栏

下列各项中，( )不属于在铁路与道路平面交叉的道口应采取的措施。

A．应当设置警示灯

B．应当设置警示标志

C．应当有人看管

D．应当设置安全防护设施