在缺铁性贫血的相应化验中唯一数值增高的指标是 （） A.胆红素 B.总铁结合力 C

阅读短文，根据内容判断正误。正确的选“A”，错误的选“B”
Blogs (博客) are the place where young people go to reveal(释放) their souls（灵魂）. Many people enjoy the freedom in blogging. Some, however, find that putting one’s life online can have a price. Some students in America got suspensions (暂停) because on their blogs they posted threatening words to their teachers.
Recent surveys found that nearly one fifth of teens who have access to the Web have their own blogs. And 38% of teens say they read other people’s blogs. By comparison, about a tenth of adults have their own blogs and a quarter say they read other people’s online journals.
With the development of the Internet, more and more people will be engaged in blogging.
In another survey, 79% of teens agreed that people at their age aren’t careful enough when giving out information about themselves online. Besides, careless blogging can also affect blog viewers. When you are angry or frustrated, your blog is the first place you turn to. The words you post then may not be rational which you may regret(后悔) later. To reduce the negative effect, change the permission setting and make such posts “private” so that only you can read them.
As long as you are careful with what you post, blogging is a great means of staying in touch with friends and displaying one’s creative works.
小题1:      Blogs are the place where people go online to express themselves freely.
小题2:     The fact that some American students got suspensions is used to show that people should not put their life online. 

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小题3:      The underline word “rational” in the fifth paragraph probably means reasonable（合理的）.

小题4:     The passage is mainly about advantages and disadvantages of blogs.
小题5:     Recent surveys found that over 50％ of teens who have access to the Web have their    own blogs.