下列说法正确的是() A.需要加热才能发生的反应一定是吸热反应 B.反应是放热还

题型:选择题

问题:

下列说法正确的是(     )

A.需要加热才能发生的反应一定是吸热反应

B.反应是放热还是吸热由反应物和生成物的总能量的相对大小决定

C.伴有能量变化的物质变化都是化学变化

D.放热反应在常温下一定容易发生

考点:能量的相互转化
题型:选择题

阅读理解。

    What's a blog? A blog is a personal online diary (日记). It's cool, it's hot, and everyone is doing it. People

talk about it often. Sound like a fashion? In fact, It's another trend (流行趋势). And the word "blogger" means

a person who writes diaries online. Are you a blogger?  

     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 their

parents and homework. They share diaries, post (发布) songs from the latest bands 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 the 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 children.  

     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 where it 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.   

1. The underlined word "it" in the first paragraph means _____.  

A. the fashion

B. the Internet

C. the blog

2. Which of the following is NOT TRUE?  

A. Teenagers don't tell about their personal life in their blogs.  

B. Teenagers mostly write down what they do every day in their blogs.  

C. Teenagers complain about their parents and homework in their blogs.  

3. What's the main idea of the third paragraph?  

A. Many parents don't understand kids' language in their blogs.  

B. Many parents are worried about these young bloggers.   

C. Many parents can understand why their kids don't like studying. 

4. Many parents think it's _____ for their children to get messages from strangers.  

A. dangerous

B. interesting

C. surprising   

5. We can learn from the last paragraph that _____.  

A. It's easy for many teenagers to give up blogging on the Internet   

B. It's safe for many teenagers to put their personal information on the Internet  

C. It's popular for many teenagers to use blogs on the Internet 

题型:选择题

下列大气污染源中,属于体源的有()。

A.焦炉炉体

B.集气筒

C.屋顶天窗

D.烟囱

题型:选择题

基层预算单基层预算单位的主管单位与当地财政专员办对基层预算单位的同一开户申请有异议时,应听主管单位意见即可。位开户应先报送主管单位审核签署意见,然后再报当地财政专员办审批。

题型:选择题

原发性甲减是指:()

A.由于下丘脑或垂体疾病所致

B.由于甲状腺本身疾病所致

C.由于下丘脑疾病所致

D.由于甲状腺对TSH有抵抗

E.由于靶组织对TH不敏感

题型:选择题

下列担保形式主要用于保管合同、运输合同、加工承揽合同等主合同的是( )。

A.保证
B.抵押
C.质押
D.留置

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