若|a|a+1=0,则a是( ) A.正数 B.负数 C.非正数 D.非负数

题型:选择题

问题:

|a|
a
+1=0
,则a是(  )
A.正数B.负数C.非正数D.非负数
考点:有理数除法
题型:选择题

阅读理解.

                                          A new Long March (长征)

     Twenty-one people from Hong Kong and the Chinese mainland began a new Long March on

October 15. They will walk about 8,000 kilometres from Ruijin, Jiangxi to Wuqi, Shanxi. They hope

to get 20.2 million yuan to build 101 schools and help poor children go back to school. They hope to

finish the march by August 16, 2012.

                                              The football team

     The Chinese under-17 football team is No. 1 in Asia. They won the Asian U-17 Championship

(亚洲U-17锦标赛) in Japan on Saturday. They beat the Democratic People's Republic of Korea

(朝鲜) by 1: 0. After 85 minutes, Wang Weilong got the only goal. They took the cup for the first

time in 12 years.

                                               Liu leaves China

     Chinese actor Liu Ye left for the US on Monday to make a film called Meteor (《流星》). He

is going to act with the Hollywood film star Meryl Streep. His former classmate Zhang Ziyi sent Liu

a message to encourage him. Liu was worried about his English, and worked hard on it before he left.

People know him from films like last year's "Mei Ren Cao".

1. From the news,we know that the twenty-one people began a new Long March to ______.

A. travel around China

B. visit some schools

C. teach poor children

D. get some money and help poor children go back to school

2. The second piece of news tells us ______.

A. Korea held this contest

B. the Chinese football team is No. 1 in South-East Asia

C. the Chinese under-17 football team won the world championship

D. the Chinese under-17 football team won the championship for the first time in 12years

3. Which of the paragraphs is about sports? ______

A. The 1st

B. The 2nd

C. The 3rd

D. The 3th and the 1st

题型:选择题
若非零实数m、n满足tanα-sinα=m,tanα+sinα=n,则cosα等于(  )
A.
n-m
m+n
B.
m-n
2
C.
m+n
2
D.
m-n
n+m
题型:选择题

中国药典检查药物中的残留有机溶剂采用的方法是

A.干燥失重测定法

B.比色法

C.高效液相色谱法

D.薄层色谱法

E.气相色谱法

题型:选择题

药物在血浆中与血浆蛋白结合产生下列哪种现象

A.药物能更好发挥作用
B.药物代谢加快
C.药物转运加快
D.药物被储存暂时失去药理活性
E.药物排泄加快

题型:选择题

比较GIF和GPEG的不同

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