单项选择题
1、 随意安排甲、乙、丙3人在3天节日中值班一天。那么甲排在乙之前的概率是    （   ）
 


2、 若f(x+1)=1/2f(x)，则函数f(x)可以是    (  )
A．
B．
C．
D．


3、 建立西夏王朝的少数民族是（　　）
A．女真
B．契丹
C．吐蕃
D．党项


4、 关于图4-4的说法，正确的是（　　）
A．山脉以北为针叶林，以南为阔叶林
B．山脉以北为玉米产区，以南为小麦产区
C．山脉以北河流冰期长，以南河流冰期短
D．山脉以北为暖温带，以南为亚热带

5、 中国近代史以鸦片战争为开端，主要是因为（　　）
A．中国自给自足的自然经济已经解体
B．中国次被西方资本主义强国打败
C．鸦片战争后中国社会性质开始发生变化
D．鸦片战争后民族矛盾成为主要矛盾


6、通读下面的短文，回答题。
     When did you last see a polar bear? On a trip to a zoo, perhaps? If you had attended a winteractivity in New York a few years ago, you would have seen a whole polar bear club． These" PolarBears" are people who meet frequently in winter to swim in freezing cold water． That day, the airtemperature was 3oC, and the water temperature was a bit higher． The members of the Polar BearClub at Coney Island, New York are usually about the age of 60． Members must satisfy two require-．~
     ments． First, they must get along well with everyone else in the group． This is very important becausethere are so many different kinds of people in the club． Polar Bears must also agree to swim outdoorsat least twice a month from November through February．
      Doctors do not agree about the medical effects of cold-water swimming． Some are worried aboutthe dangers of a condition in which the body' s temperature drops so low that finally the theart stops．Other doctors, however, point out that there is more danger of a heart attack during summer swimmingbecause the difference between the air temperature and water temperature is much greater in surmner thanin winter．
     The Polar Bears themselves are satisfied with the benefits (or advantages)of cold-water swim-ming． They say that their favorite form of exercise is very good for the circulatory system(循环系统)because it forces the blood to move fast to keep the body warm． Cold-water swimmers usually turnbright red after a few minutes in the water． A person who turns blue probably has a very poor circula-tory system and should not try cold-water swimming．
      The main benefits ( or advantages) of cold-water swimming are probably mental． The Polar Bearslove to swim year-round; they find it fun and relaxing． As one 70-year-old woman says," When I gointo the water, I pour my troubles into the ocean and let them float away． "
Doctors__________．
A．encourage people to take part in cold-water swimming actively
B．point out the possible danger of blood illness during cold-water swimming
C．believe swimming is helpful both in winter and in summer
D．have different ideas about the medical effects of cold-water swimming


填空题
7、已知球的一个小圆的面积为9π，球心到小圆所在的平面距离为4，则这个球的表面积为    。

8、 将8．4g铁粉跟50 mL盐酸充分混合反应后，有固体剩余，同时收集到1．12 L(标准状况下)H₂．原盐酸的物质的量浓度为______mol／L．


简答题
9、 读图3-8“全球人口、资源与环境污染预测图”，回答问题：
(1)指出图中各曲线的含义：
a．__________
B．__________
C．__________
(2)到2000年为止，全球人口、资源、环境污染三者的关系是： __________ ；

(3)未来100年，如果仍然按照工业文明思路攫取巨额社会财富，则人口、资源、环境之间的关系将是__________；
(4)对我国而言，解决上述问题的措施有哪些?


10、 (本小题满分13分)
已知函数ƒ(x)=x³-3x²+m在区间[-2，2]上有值5，试确定常数m，并求这个函数在该
闭区间上的小值．

责编：cll  评论 纠错