根据《合同法》的规定，租赁合同的租赁期限在( )以上的，合同必须采用书面形式。A．

2008年9月震惊全国的“三鹿奶粉”事件，使约29．4万名婴幼儿出现肾结石症状，其罪魁祸首是含氮量高， 化学式为C₃N₃(NH₂)₃的三聚氰胺，三聚氰胺是一种重要的化工原料，且目前国际上又通用“测氮法”标定牛奶中蛋白质含量，于是一些不法商人就将其混入奶粉中以“提高”奶粉的品质。

（1）三聚氰胺是一种                 （填“有机”或“无机”）物，它含有                种元素，其中碳元素和氮元素的质量比                      ，它的一个分子中含有_________个原子。

（2）三聚氰胺中氮元素的质量分数为                   （保留一位小数，以下同）

（3）奶粉中蛋白质含量为15～20%，蛋白质中含氮量平均为16%，若不法分子在某品牌奶粉1袋（400g）中加了1g三聚氰铵，相当于增加了                       g蛋白质。

（4）该事件后，许多人“谈化学物质色变”。请从“化学物质与人类社会的关系”角度，谈谈你对化学物质的认识（一句话即可）                                            。

是收集社会信息的一种有效方法，它要求通过参与到具体的社会实践活动中，对项目的社会环境状况进行直接观察。

A．参与观察

B．间接观察

C．问卷调查

D．小组讨论

下列关于黄河概况描述正确的是（     ）

A．水力资源丰富，江阔水深，航运便利

B．是我国第二长河，其下游是“地上河”

C．主要景观有壶口瀑布和三峡大坝等

D．发源于巴颜喀拉山北麓，最后注入东海

阅读理解。

    Recently a Beijing father sent in a question at an Internet forum asking what "PK" meant.

    "My family has been watching the 'Super Girl' singing competition TV program. My little daughter asked

me what 'PK' means, but I had no idea," explained the puzzled father.

    To a lot of Chinese young people who have been playing games online, it is impossible not to know that

item. 

    In such Internet games, "PK" is short for "Player Kill", in which two players fight until one ends the life

of the other. 

    In the case of the "Super Girl" singing competition, "PK" was used to refer to the stage where two singers

have to compete with each other for only one chance to go up in competition ranking.

    Like this puzzled father, Chinese teachers at high schools have also been finding their students' composition

using Internet jargon (行话) difficult to understand.

    A high school teacher from Tianjin asked her students to write up compositions with colloquial (口语的)

language, but they came up with a lot of Internet jargon that she didn't understand.

    " My 'GG' came back this summer from college. He told me I've grown up to be a 'PLMM': I love to 'FB'

with him together; he always took me to the 'KPM', went one composition."

    "GG" means Ge Ge (Chinese pinyin for brother ). "PLMM" refers to Piao Liang Mei Mei (beautiful sister ).

"FB" means "to corrupt". "KPM" is short for KFC, Pizza Hut and McDonalds.

    While some specialists welcome Internet jargon as a new development in language, teachers are worried

that too much use of such language might lead students away from the "right" usages. Parents especially

worry that their children might not do well in language tests because of the use of Internet language. 

    Such as those mixed feelings are, the conciseness and liveliness of Internet language continues to attract

Internet users for making convenient communications.

    If you do not even know what a Kong Long (dinosaur, referring to ugly-looking female) or a Qing Wa (frog,

referring to ugly-looking male)is, then you will possibly be regarded as a Cai Niao!

1. By writing the article, the writer tries to ______. [ ]

A. explain some Internet jargon

B. suggest normalizing Internet language

C. draw our attention to Internet language use

D. support teachers and parents.

2. What does the writer think about the term "PK"? [ ]

A. Fathers can't possibly know it.

B. The daughter should understand it.

C. Online game players must know it.

D. "Super Girl" shouldn't have used it.

3. According to the composition, the underlined word "corrupt" probably means "______". [ ]

A. change the traditional form of something

B. often have good food or do something expensive

C. encourage someone to behave in a dishonest way

D. often have some sports to become strong

4. The example of the Beijing father and the Tianjin teacher are used to show that Internet jargon ______. [ ]

A. is used not only online

B. contains many interesting expressions

C. is hard to understand by the elders

D. causes trouble to our mother tongue

其他正当理由