you work harder, you will not pass the e

—What ______ we do then?

—Let’s go out for a walk.[ ]

A. do

B. must

C. shall

D. did

America is a country on the move. In unheardof numbers, people of all ages are exercising  their way to better health. According to the latest figures, 4 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 active.

It is hard not to get the message. The virtues of physical fitness are shown on magazine covers, postage stamps, and television ads of everything from beauty soaps to travel books. Exercise as a part of daily life did not catch on until the late 195s when research by military doctors began to show the health benefits of doing regular physical exercises. Growing publicity (宣传) for races held in American cities helped fuel a strong interest in the ancient sport of running. Although running has leveled off in recent years as Americans have discovered equally rewarding-and sometimes safer-forms of exercise, such as walking and swimming, running remains the most popular form of exercise.

As the popularity of exercise continues to mount, so does scientific evidence of its health benefits. The key to fitness is exercising the major muscle groups vigorously (强有力地) enough to approximately 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.

5.It can be learnt from the passage that the health benefits of exercise .

A.are to be further studied                     B.are selfevident

C.are yet to be proved                         D.are supported by scientific evidence

6.A growing interest in sports developed after___________ .

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

B.research showed their health benefits

C.scientific evidence of health benefits was shown on TV ads

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

7.Which of the following would be the best title for the passage?

A.Exercise-The Road to Health                 B.Scientific Evidence of Health Benefits

C.Different Forms of Exercise                  D.Running-A Popular Form of Sport

8.Which of the following is closest in meaning to the phrase “leveled off” in the paragraph 2?

A.“reached its lowest level in popularity”         B.“stopped being popular”

C.“stopped increasing in popularity”             D.“become very popular”

朝阳洞属国家级风景名胜区，为承德十大景之一，座落在承德县（）境内。

A、下板城镇

B、头沟镇

C、大营子乡

D、仓子乡

药品库安装的灯具应采用（）。

A.普通型

B.防爆型

C.防尘型

D.防水型

2011年我国全部工业增加值188572亿元。规模以上工业增加值增长13.9%，在规模以上工业中，国有及国有控股企业增长9.9%；集体企业增长9.3%，股份制企业增长15.8%，外商及港澳台商投资企业增长10.4%，私营企业增长19.5%；轻工业增长13.0%，重工业增长14.3%。

全年规模以上工业中，农副食品加工业增加值比上年增长14.1%，纺织业增长8.3%，通用设备制造业增长17.4%，专用设备制造业增长19.8%，交通运输设备制造业增长12.0%，通信设备、计算机及其他电子设备制造业增长15.9%，电气机械及器材制造业增长14.5%。六大高耗能行业增加值比上年增长12.3%，其中，非金属矿物制品业增长18.4%，化学原料及化学制品制造业增长14.7%，有色金属冶炼及压延加工业增长13.6%，黑色金属冶炼及压延加工业增长9.7%，电力、热力的生产和供应业增长10.1%，石油加工、炼焦及核燃料加工业增长7.6%。高技术制造业增加值比上年增长16.5%。

全年规模以上工业企业实现利润54.544亿元，比上年增长25.4%。

根据资料，下列表述不正确的是：（）

A．2011年，轻工业增加值的增长速度比重工业慢

B．2010年，在规模以上工业企业中，私营企业实现利润多于外商及港澳台商投资企业

C．2006年，我国全部工业增加值不足2011年的一半

D．2011年，在规模以上工业企业中，股份制企业实现利润是国有及国有控股企业的2倍多