圆柱的底面圆半径扩大3倍,则圆柱的底面周长扩大3倍,体积扩大6倍.______.

题型:解答题

问题:

圆柱的底面圆半径扩大3倍,则圆柱的底面周长扩大3倍,体积扩大6倍.______.

考点:圆柱的表面积圆柱的体积
题型:解答题

阅读与表达。

     Happiness is U-shaped, for we are happier at the start and end of our lives but hit a slump (低潮) when

we are middle-aged, scientists from England and America say. They have studied the information on the

mental (心理的) health of two million people from 80 countries.

     In England, the probability of low spirits for men and women reaches the highest point at around 44 years

of age. In America, though, there is a big difference between men and women. Among women, unhappiness

reaches the highest point at around the age of 40, but among men, it is about 50.

     But the U-shape of happiness is unchanging around the world, and the mid-life sadness happens regardless

of marital status (婚姻状况), changes in jobs or pay. It happens to men and women, to single and married

people, to rich and poor, and to those with and without children.

     One possibility may be that people realize many of their dreams won't come true at middle age. The

researchers said another reason could be that seeing their middle- aged friends die one by one, people begin to

value their own remaining years and their Iove of the nature and long for peaceful and free life once more.

     But the good news is that if people make it to aged 70 and are still physically fit, they are on average (平均)

as happy as a 20-year-old person. For the average people in the modem world, the fall in mental health and

happiness doesn't come on suddenly in a single year. Only in their fifties do people get out of this low period.

1. Do people feel happy at the start and end of their lives?

    _____________________________________________________________________________________

2. Where are the scientists in the passage from? 

    _____________________________________________________________________________________

3. When does the unhappiness reach the highest point among men in America, at the age of 40 or about 50?

    _____________________________________________________________________________________

4. What is the good news for a 70-year-old healthy man? 

    _____________________________________________________________________________________

5. How will a teenager feel in his future life according to the passage? 

    _____________________________________________________________________________________

题型:解答题

女性,68岁,因子宫内膜癌行盆腔廓清术后3天,诉左小腿轻度疼痛。查体:左足轻度可凹性水肿。左腓肠肌压痛且足背伸时疼痛加剧,足背动脉搏动好。最简捷的诊断方法是

A.血生化检查

B.下肢动脉造影

C.下肢静脉造影

D.下肢血管Doppler超声检查

E.血清肿瘤标志物检查

题型:解答题

2001年我国乡镇企业的发展概况

 实现增加值  29356亿元,比1989年增长13.1倍  占全国国内生产总值30.5%
 完成工业增加值  20315亿元,比1989年增长12倍  占全国工业增加值的47.7%
 完成出口产品交货值  9599亿元
 营业收入  116585亿元
 实现净利润  6001亿元
 实交税金  2308亿元  占全国财政收入14%
 从业人员数  13085万人  占全国农村社会动力的26.66%

2001年乡镇企业发展实现的净利润是:

A.20315亿元

B.2308亿元

C.116568亿元

D.6001亿元

题型:解答题

1512年,谁参加了历法改革的会议,并提出历法改革需要相应的理论()

A、布鲁诺

B、伽利略

C、哥白尼

D、亚里士多德

题型:解答题

一般而言,经济周期包括哪几个阶段()

A.复苏

B.繁荣

C.衰退

D.萧条

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