不等臂直杠杆在动力和阻力作用下，已处于平衡状态，采用下列办法不能使杠杆平衡的是：

下列有关资产成长率的叙述正确的是( )。

A．资产成长率表示家庭财富增加的速度

B．生息资产比重愈大，一定可以提高资产成长率

C．期初总资产愈多，成长率一定愈高

D．财务杠杆操作，一定可以增加财富

艾滋病是由一种______引起的疾病，它寄生在人体的淋巴细胞中，破坏淋巴细胞而导致人体______能力下降．

甲乙两人同时分别从A、B两地出发，沿连接这两地的道路向另一地前行，这段道路长为9千米，甲的速度为4千米/小时，乙的速度为5千米/小时，同时，甲带的小狗以7.5千米/小时的速度奔向乙，小狗遇乙后又立即回头奔向甲，遇甲后又立即奔向乙，…，直到甲、乙相遇，那么小狗总走的路程是______千米．

区域比较是学习区域地理时的重要学习方法。中美两国是世界大国，自然地理条件复杂。读下列材料，回答问题：（共9分）

材料一：中美两国地形剖面图                  材料二：某地气温曲线降水量柱状图

甲

1.根据材料一，概括中美两国地势特征:                            　          。

2.材料一中甲、乙所在的地形区名称分别是           高原和             平原。

3.中美两国西部地区海陆位置的差异是                  　                    。

4.材料二代表的气候类型最有可能分布在材料一①、②、③、④四地中的   地（填数字），该地气候的成因是                    　　　　                              。

5.我国西部地区生态系统脆弱，造成此特点的最主要的自然原因是__________________。中美两国在西部开发过程中都有过惨痛的教训，现在我国为保护西部地区脆弱的生态环境，采取的一项重要措施是______________________________________。这项措施的主要目的是防止                             ，从而改善生态环境，促进农业可持续发展。

Recently a Beijing father sent in a question at an Internet forum(论坛) asking what “PK” meant. “My family has been watching the ‘Super Girl’ singing competition TV program. My little daughter asked me what ‘PK’ meant, 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 this term. 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 father, Chinese teachers at high schools have also been finding their students’ compositions using Internet jargons(行话) which are difficult to understand. A high school teacher from Tianjin asked her students to write compositions with simple language, but they came up with a lot of Internet jargons 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 loved 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 girl). “FB” means Fu Bai(corruption). “KPM” is short for KFC, Pizza Hut and McDonald’s.

Some specialists welcome Internet jargons as a new development in language.

If you do not even know what a Kong Long(dinosaur, referring to an ugly looking female) or a Qing Wa(frog, referring to an ugly looking male) is, you will possibly be regarded as a Cai Niao!

小题1:By writing the article, the writer tries to              .

A．explain some Internet language

B．suggest common Internet language

C．laugh at the Beijing father

D．draw our attention to Internet language小题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 may know it.

D．“Super Girl” shouldn’t have used it.小题3:The examples of the Beijing father and the Tianjin teacher are used to show that Internet jargons              .

A．are used not only online

B．can be understood very well

C．are welcomed by all the people

D．cause trouble to our mother tongue小题4: What would be the best title for the passage?

A．A puzzled father

B．Do you speak Internet-ish?

C．Keep away from Internet-ish

D．Kong Long or Qing Wa?