反映钢筋塑性性能的基本指标有() A.屈服强度 B.伸长率 C.极限强度 D.冷弯性

题型:多项选择题

问题:

反映钢筋塑性性能的基本指标有()

A.屈服强度

B.伸长率

C.极限强度

D.冷弯性能

E.冷拉性能

考点:水利水电工程(二建)水利水电工程综合练习水利水电工程综合练习题库
题型:多项选择题

春秋战国时期的土地利用率和农作物产量显著提高,主要是因为(  )

A.农业重视使用肥料  

B.青铜器在农业中的广泛使用

C.水利工程的兴修   

D.铁农具和牛耕的推广

题型:多项选择题

PEM的高发地区为()

A.东欧地区

B.北欧地区

C.东亚地区

D.美洲地区

E.南亚和非洲

题型:多项选择题

某生育期妇女患地方性甲状腺肿,有关该妇女患病期间生育孩子的健康情况的推断,可能性最大的是(   )

A.患侏儒症

B.患呆小症

C.患甲状腺功能亢进

D.患糖尿病

题型:多项选择题

认为儿童文学家的“基本品格应该首先是热爱儿童”的是著名文学家()

A.列夫·托尔斯泰

B.阿·托尔斯泰

C.高尔基

D.肖霍洛夫

题型:多项选择题


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

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