如图所示，重力G=50N的物体静止在斜面上，斜面的倾角q=370，物体对斜面的压力为

已知y=f（x）的反函数是y=f-1（x），若方程f（x）+x-1=0与f-1（x）+x-1=0的实数解分别为α，β，则α+β=（　　） A．1 B．2 C．-1 D．-2

马尔库塞浪漫美学的根基是（）。

网页留言效果如下图所示，网页文档如下，请参照表格给出的说明在下划线处填写正确的答案到答题纸对应的栏内。

[上图网页中的元素说明]

序号	名称	说明
(1)	表单	Name:"FormName"method:"post" action:http://www.abc.com/suggestions.jsp
(2)	文本框	Id:"email"name:"textEmall"size:"40"
(3)	滚动文本框	Id:"questions"name:"textSuggestions"rows:"6"cols:"40"
(4)	水平线	Size:"1"
(5)	电子邮件超链接	webmaster@hotmail.com

　　[HTML文本]
＜!DOCrYPE HTML PUBLIC“-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www．w3．org/TR/html4/loose．dtd"＞
＜html＞
＜head＞
＜title＞您的意见就是对我们工作莫大的支持!＜/title＞
＜metahttp-equiv="Content-Type"content="text/html；charset=gb2312"＞
＜/head＞
＜body＞
(1)
＜tablewidth="400"border="0"celipadding="0"cellspacing="2"＞
＜tr style="vertical-align:top"＞
＜tdwidth="24%"align="center"valign="middle"class="TitleColor"＞
＜label for="name"，意见主题＜/label＞
＜label for="username"＞，＜/label＞
＜label for="questions"＞＜/label＞
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＜br＞ ＜/td＞
＜td width="76%" class="TitleColor"＞
＜label for="browser"＞＜/label＞
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＜tr style="vertical-align:top"＞
＜td align= "center"valign="middle"class="TitleColor"，＜label for="label"，电子邮件＜/label＞＜/td＞
＜td Class="TitleColor"＞
(2)
＜/td＞
＜/tr＞
＜tr style="vertical-align:top"＞
＜tdalign="center"valign="middle"class="TitleColor"＞＜label for="label")您的姓名＜br＞
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＜td class="TitleColor"＞＜input type="text" id="name" name="textName" size=＜"40"＞＜/td＞
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＜tdheight="29"colspan="2"＞ ＜div align="center"＞
＜inputtype="submit"name="Submit"value="提交"＞
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(5)
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＜/html＞

Believe it or not，optical illusion can cut highway crashes.

Japan is a case in point．It has reduced automobile crashes on some roads by Rearly 75 percent using a simple optical illusion．Butst．ripes,called chevrons(人字形)，painted on ther rads make drivers think that they are driving faster than they really are，and thus drivers slow down.

Now the American Automobile Association Foundation for Traffic Safety in Washington D．C. is planning t。repeat Japan’s success．Starting next year，the foundati。n will paint cheyrons and。ther pattems of stripes on selected roads around the country to test how well the patterns reduce highway erashes．

Excessive(too great)speed plays a major role in as much as one fifth of all fatal traffic accidents， according to the foundation．To help reduce those accidents，the foundation will conduct its tests in areas where speed-related hazards(danger)are the greatest curves，exit slopes，traffic circles，and bridges．

Some studies suggest that straight，horizontal bars painted across roads can initially cut the average speed of drivers in half．However,traffic。ften returns to full speed within months as driVers become used to seeing the painted bars．

Chevrons，scientists say，not only give drivers the impression that they are driving faster than they reallv are but als0 make a lane appear to be narrower．The result is a longer lasting reduction in highway speed and the number of traffic accidents．

The advantage of chevrons over straight, horizontal bars is that the former（）

A. can keep drivers awake

B. can cut road accidents in half

C. will look more attractive

D. will have a longer effect on drivers

心肺复苏只可用于急性心肌梗塞引起的呼吸、心跳骤停急救。