单项选择题
1、

A．4π和√2 -1
B．π和-√2 -1
C．π和√2 -1
D．π/2和-√2 -1


2、通读下面的短文，回答题。
     "Seasame Street" has been called "the longest street in the world"．
     This is because the television program by that name can now be seen in so many parts of the world．The program, which went on the air in New York in 1969, uses songs ,jokes, and pictures to givechildren a basic understanding of numbers, letters and human relationships． More than 6 million chil-dren in the United States watch it regularly． The viewers (观众) include more than half the nation' schildren before school age．
     Many teachers consider the program a great help, though some teachers find that problemshappen when the first-year pupils who have learned from "Seasame Street" are in the same class．~
     with those who have not watched the program． Tests have shown that children who watch it five timesa week learn more than those who seldom watch it． In the United States the program is shown atdifferent hours during the week in order to increase the number of children who can watch it regularly．Why has "Seasame Street" been so much more successful than other children' s shows? Manyreasons have been suggested． Perhaps one reason is that mothers watch "Seasame Street" along withtheir children． But the best reason for the success of the program may be that it makes every childwatching it feel able to learn． The child finds himself learning, and he wants to learn more．
People call "Seasame Street" the longest street in the world because__________．
A．it is the longest TV program ever produced
B．it took much more time to put on this program than any other one
C．it is shown almost throughout the world
D．it has been on the air since 1969


3、 下列各句中加点成语使用恰当的一项是（　　）
A．上海的娱记几乎倾巢出动，其他省市的也一大早就纷纷来到新闻发布会现场等候。
B．海淀区十一学校甘兰佑老师面对生活中的变故安之若素，依然坚守三尺讲台。
C．清华大学水利工程学院的师生们在一次野外勘察中，意外发现了一片原始喀斯特岩溶地貌，那些岩石形态优美，真是巧夺天工。
D．“秦晋之好”这个成语是说春秋时期的秦、晋两个国家之间几代都有婚姻关系，可谓是间不容发。


4、 某酯水解生成甲和乙两种物质．同温同压下，相同质量的甲和乙的蒸气占有相同的体积．该酯的结构简式为(  )



5、
A．anger
B．cacne
C．hunter
D．silence


6、
A．图中A
B．图中B
C．图中C
D．图中D


7、
A．A
B．B
C．C
D．D

填空题
8、 乙烷和乙炔的混合气体10 L，与5 L相同状况下的H₂恰好完全反应，都变成饱和烃．原混合气体中乙烷的体积为______L．


简答题
9、 图5-6为黄河流域图，回答下列问题：

(1)黄河流域有丰富的能源，其上中游是“西电东送”北线的能源输出地，上游提供的能源以__________为主；中游地区分布着丰富的__________资源；下游地区分布的主要能源是__________。
(2)在该河上游有两个著名的灌溉农业区，在这些地区如果水资源使用不当，容易引发的生态问题是——(填选项字母)。
A．酸雨
B．土壤次生盐渍化
C．赤潮
D．下游水资源短缺
(3)图中长城一线是我国北方的农牧过渡带的一部分。调查显示：近300年来，该过渡带荒漠化情况为严重，其自然原因是__________；人为原因是__________。
(4)解决荒漠化问题必须走__________之路。


10、 Ω，R₂=1.8Ω，R₃=R4=2Ω，平行板电容器的电容C=1×10^-8F，两板间距离d=0·2 mm·求：
(1)电容器所带的电荷量；
(2)电容器两板间的电场强度．

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