决定运动负荷的因素是()。A、运动强度和运动频率 B、运动速度和运动时间 C、运动节

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问题:

决定运动负荷的因素是()。

A、运动强度和运动频率

B、运动速度和运动时间

C、运动节奏和运动时间

D、运动强度和运动时间

考点:体育科学大学体育理论大学体育理论题库
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小华每分拍球25下,小英每分比小华少拍5下,照这样计算,小英5分钟可拍球多少下?

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树是结点的集合,它的根结点数目是( )。

A.有且只有1个

B.1或多于1个

C.0或1个

D.至少2个

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Directions: There are 4 passages in this part. Each of the passages is followed by 5 questions or unfinished statements. For each of them there are 4 choices marked A, B, C and D. Choose the best one.
Passage One

American consumers like convenience very much. During the last 50 years, there has been a dramatic increase in such labor-saving devices as automatic washing machines, clothes dryers, dishwashers, food processors, microwave ovens, garbage disposals and power lawn mowers. Today, all of these and many more, are found in a typical suburban home. These labor-saving devices are designed to reduce the time spent on housework. However, the time that Americans save is quickly spent on other activities.
The American desire for convenience also created the concept of fast-food restaurants, found in every city and almost every small town in the United States, and now exported all over the world. These fast-food restaurants, such as McDonald’s and KFC, serve sandwiches, salads, fried chicken, seafood, and other food to hurried customers in five minutes or less, often at a drive-up window. There are also a wide variety of restaurants that will deliver Chinese food, pizza, and other dishes to people’s homes in about a half-hour. In many areas there are "take-out taxis" that will deliver food from the menus of 20 or 30 different restaurants for a small charge. For those who prefer to prepare their food at home, American grocery stores are full of convenience foods that are packaged and ready to cook or even precooked.
Like microwave ovens and dishwashers, fast-food and take-out restaurants are convenient because they save the American consumer time that would otherwise be spent fixing meals or cleaning up. More than half of all the women in the United States are currently employed. This includes mothers with children under the age of 18. More than half the women with little children under the age of six hold jobs. Sixty-eight percent of the women who have school-age children are employed. Families with working mothers need all the time-savers they can get.
Thus, the conveniences that Americans desire reflect not so much a leisurely lifestyle as a busy lifestyle in which even minutes of time are too valuable to be wasted. Alexis de Tocqueville was one of the first to see in this a curious paradox (自相矛盾) in the American character. He observed that Americans were so busy working to acquire comforts and conveniences that they were unable to relax and to enjoy leisure time when they had it. Today, many Americans have what one medical doctor has called "the hurry sickness".

"The curious paradox in the American character" (Last Para. ) means that ______.

A.Americans were so busy working to acquire comforts and conveniences that they were unable to relax and to enjoy leisure time when they had it

B.Americans love comforts and conveniences very much, yet they don’t know how to get them

C.Americans value time very much, yet they are too wasteful of material things

D.Americans know it’s unhealthy to eat fast food, but they just can’t resist it

题型:单项选择题

从满足人类入住需要的角度出发,房地产产品的功能可从适用程度、屋宇设备完备程度、平面布置、物理性能、耐久程度和建筑艺术等方面进行评价。()

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患儿生后7天,在家接生,出现发热,烦躁不安,吸吮困难,苦笑面容,阵发性痉挛、惊厥,脐部发红

该患儿护理措施不正确的是()。

A.保持室内的绝对安静

B.保持呼吸道通畅

C.保证能量供应

D.每2小时测体温、心率

E.防止骨折发生

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