列哪一项不足以说明病毒是网络攻击的有效载体（）A.网络攻击程序可以通过病毒经由多种渠

It’s cool, it’s hot, and everyone is doing it. People talk about it often, and friends tell other friends how good they look. Sound like a fashion? In fact, it’s another trend (流行趋势): “blog”. What’s a blog? A blog is a personal online diary. The word “blogger” means a person who writes diaries online.

Many bloggers are teenagers who log (进入) onto websites to discuss anything in their lives. Many of today’s teenagers are not afraid to openly discuss everything in their lives. Teenagers complain about parents and homework. They share diaries, post songs from the latest bands (乐队) and show pictures of theirs. They write their own poems, say something about their girlfriends or boyfriends and complain to each other or offer support. But mostly they just write down what they do every day.

However, many parents are worried about these young bloggers. Parents see the kids talking about how they got drunk last weekend and how they don’t like studying. They are using language that is surprising to their parents. Besides hearing from their friends, teen bloggers also get messages from strangers. Most of the time, it’s older men asking to meet teenage girls. “These strange men are dangerous for my kids. They sometimes teach my kids bad words,” said Cara Cabral, a mother of two.

Many teenagers and young adults know it’s not safe to use blogs on the Internet. They know they are putting information about themselves in a place they can be seen by anyone. But teenagers are unwilling to give up these new communication tools that have become a way of life for many of them.

小题1:The word “it” means ________ in the sentence “People talk about it”.

A．the Internet

B．the blog

C．the website

D．talking online小题2:Parents think it’s dangerous for their kids to use blogs because _______.

A．their kids use a surprising language

B．their kids talk about how they don’t like studying

C．teen bloggers get messages from strangers

D．their kids talk about their girlfriends or boyfriends小题3:Which of the following is NOT true according to (依据) the passage?  

A．It’s easy for teenagers to give up blogging.

B．Many teenagers know it’s not safe to use the blog on the Internet.

C．A blogger’s information about himself can be seen by anyone on the Internet.

D．Most of today’s teenagers aren’t afraid to openly discuss everything in their lives.

治疗再障下列哪项是错误的

A．环孢素

B．抗淋巴细胞球蛋白

C．雄激素

D．粒-单核系集落刺激因子

E．脾切除

甲公司用自己市价1000万元的办公楼作为抵押向银行借款800万元，银行审查后，认为该市的房地产市场前景不明朗，房产可能会贬值，要求甲公司再提供一项担保，甲公司找到乙公司，乙公司用自己价值500万元的设备作为抵押为甲公司担保，银行与甲公司和乙公司签订了抵押合同，并进行了抵押登记，但是未对抵押财产担保的债权份额和顺序进行约定，借款合同到期后，甲公司无力还本付息，以下说法正确的是( )

A．银行可以要求只对乙公司的设备行使抵押权

B．银行可以要求对甲公司的房产和乙公司的没备同时行使抵押权

C．甲公司的房产被行使抵押权后，甲公司有权向乙公司追偿

D．如果银行提前放弃对甲公司房产的抵押权，乙公司有权要求减免自己的担保责任

调查人员不是亲自观察购买者的行为，而是观察行为发生后的痕迹的调查方法是( )。

A．直接观察法
B．间接观察法
C．实际痕迹测量法
D．行为记录法

用于侧向接发旅客列车的单开道岔，不得小于（）号。

A、9

B、12

C、18