下图表示人体免疫某一过程的示意图，分析并回答有关的问题：如果图中所示的抗原为酿脓链球

在某两个正数x,y之间,若插入一个数a,使x,a,y成等差数列,若插入两个数b,c,使x,b,c,y成等比数列,求证:(a+1)²≥(b+1)(c+1).

图为我国今年春节前南方雪灾中的一个场景。

（1）汽车在急刹车时，总是滑行一段距离才能停下来，这是由于汽车具有______________；当路面有冰雪时，轮胎与地面间的__________会变小，所以汽车在急刹车后滑行的距离将比路面没有冰雪时长。

（2）请你给在这样的天气条件下驾车的司机师傅提一个建议：__________________________________.

（3）化雪的时候，人们会感觉很冷，这是因为雪熔化时要___________的缘故。

（4）人们观雪景时，会感觉白雪很耀眼，那么白雪对光产生的是___________反射。

It doesn’t matter when and how much a person sleeps , but everyone needs some rest to stay alive. That’s what all doctors thought , until they heard about Herpin. Herpin, it was said , never slept. Could this be true? The doctors decided to see this strange man themselves.

Herpin was 90 years old when the doctors came to his home in New Jersey. They thought for sure that he got some sleep of some kind. So they stayed with him and watched every movement he made. But they were surprised. Though they watched him hour after hour and day after day, they never saw him sleeping. In fact, he did not even own a bed. He never needed one.

The only rest that Herpin sometimes got was sitting in a comfortable chair and reading newspapers. The doctors were puzzled by this strange continuous sleeplessness. They asked him many questions, hoping to find an answer. They found only one answer that might explain his condition. Herpin remembered some talk about his mother having been injured several days before he was born. But that was all. Was this the real reason? No one could be sure. Herpin died at the age of 94.

小题1:The main idea of this passage is that_____

A．large numbers of people do not need sleep

B．a person was found who actually didn’t need any sleep

C．everyone needs some sleep to stay alive

D．people can live longer by trying not to sleep小题2:The doctors came to visit Herpin, expecting_____

A．to cure him of his sleeplessness

B．to find that his sleeplessness was not really true

C．to find out why some old people did not need any sleep

D．to find a way to free people from the need of sleeping小题3:After watching him closely, the doctors came to believe that Herpin_____

A．needed some kind of sleep

B．was too old to need any sleep

C．needed no sleep at all

D．often sleep in a chair小题4:One reason that might explain Herpin’s sleeplessness was _____

A．his mother’s injury before he was born

B．that he had gradually got rid of the sleeping habit

C．his magnificent physical condition

D．that he hadn’t got a bed小题5:Herpin’s condition could be regarded as ______

A．a common one

B．one that could be cured

C．very healthy

D．a rare one

请在“考试项目”菜单上选择“电子表格软件使用”菜单项，完成下面的内容。
(所有的电子表格文件都必须建立在指定的文件夹中)
在考生文件夹下创建工作簿文件EX7.XLS，按要求在EX7.XLS中完成以下操作。
1．在sheetl 22作表中建立如下内容工作表，并用函数求出每人的平均成绩，结果保留1位小数，表格行高20，列宽10，数值数据水平右对齐，文字数据水平居中，所有数据垂直靠下，表标题跨列居中、18磅、隶书、红色字，并将工作表命名为“平均表”。

	A	B	C	D	E	F
1	成绩表
2	学号	姓名	班级	平时	期末	平均
3	1001	陈越东	三班	78	87
4	1002	巴特	一班	77	76
5	1003	买买提	二班	86	90
6	1004	马永玲	二班	90	95

2．将平均表复制为—个名为“统计”的新工作表，筛选出平均成绩肋分以上的人，以“统计”为工作表名存在EX7．XLS文件中。

为抑制需求，采取紧缩性的货币政策主要运用（）

A.中央银行售出政府债券

B.降低中央银行对金融机构的再贴现率

C.提高中央银行对金融机构的再贷款利率

D.提高商业银行的法定准备率

E.增税