门静脉与肝静脉的声像图区别是（）。 A.门静脉管壁呈强回声 B.肝静脉与下腔静脉汇合

数据类型是( )。

A．字段的另一种说法

B．决定字段能包含哪类数据的设置

C．一类数据库应用程序

D．一类用来描述Access表向导允许从中选择的字段名称

请你就以下肉容代云南省县联社向省联社拟写一份300左右的分文： 2005年，县发生里氏6.2级地震，造成县联社房屋等财产的较大损失，部分员工生活学到影响。为了尽快恢复正常的工作，稳定员工情绪，县联社向上级行文要求经济上帮助支持。

D

In the 1960s, people asked about your astrological sign(星相). In the 1990s, they wanted to know your website (网址). These days, having a web address is almost as important as a street address. Your website is an electronic meeting place for your family, friends and potentially, millions of people around the world. Best of all, you may not have to spend a cent. The Web is filled with all kinds of free services and all it takes is some time and creativity.

Think of your home page as the starting point of your website. Like the table of contents of a book or a magazine, the home page is the front door. Your site can have one or more pages, depending on how you design it.

While web pages vary greatly in their design and content, most use a traditional magazine layout (版面设计). At the top of the page is a banner(大标题) GRAPHIC. Next comes a greeting and a short description of the site. Pictures, texts, and links to other websites follow.

Before you start building your site, do some planning. Think about whom the site is for and what you want to say. Next, gather up the material that you want to put on the site. Draw a rough layout on a sheet of paper.

While there are no rules you have to follow, there are a few things to keep in mind:

Start simply If you are too ambitious (雄心勃勃的) at the beginning, you may never get the site off the ground. You can always add to your site.

Less is better Most people don't like to read a lot of text online. Break it into small pieces.

Smaller is better Most people connect to the Internet with a modem (调制解调器). Since it can take a long time to download large image files, keep the file sizes small.

Have the rights Don't put any material on your site unless you are sure you can do it legally (合法地). Learn the Net's Copyright Article for more about this.

Now it's time to roll up your sleeves and start building. Learning the Net Communities provides tools to help you build your site.

68. The main purpose of the passage is to tell you _____.

A. what a website is like

B. how to build your own website

C. how to meet people online

D. what a website is made up of

69. According to the writer, your website is a place _____.

A. where you can meet people all around the world

B. where you can buy what you want

C. where you can get free services

D. where you can meet people on the Internet

70. The purpose of the home page of your website is _____.

A. to give a list of all the contents of your website

B. to make it look like a front door

C. to direct people to more of your pages

D. to design the cover of a book or magazine

71. The writer thinks that if you are too ambitious at the beginning, _____.

A. your website may leave no space for adding new things

B. you may never have your wetside working

C. you may have no idea how to build your website

D. you may tire yourself out

玉米种子化学成分的特点。

去死因寿命表方法求得消除某种死因后的平均预期寿命的增量，综合说明（）对人类寿命的影响

A.某种环境因素

B.某种死因

C.卫生状况

D.社会经济因素

E.遗传因素