电解水生成氢气和氧气的过程属于（ ） A．化学变化 B．物理变化 C．化合反应
题型：选择题
问题：
电解水生成氢气和氧气的过程属于（ ）
A．化学变化
B．物理变化
C．化合反应
D．置换反应
题型：选择题
阅读理解。
Here is some news from Dalian Daily．
·President's pet．
Do you keep a pet? American President Obama does．He calls his new dog Bo．It is six months
old．The president's family like the dog very much．Look! They are having fun with Bo on the South
Lawn (南草坪)of the White House．The president's daughter, Malia ,is showing the dog off．
·Back on her feet．
Mosha is a young elephant in Thailand．She lost her right front leg after stepping on a landmine(地雷)
two years ago．She was taken to a hospital and became the first elephant in the world with a prosthetic leg
(假肢)．
Now aged three Mosha is growing up．She is happy to have the new prosthetic leg．
·Liu Xiang
World champion Liu Xiang returned to Shanghai on March 8．The 25-year -old star had a foot
operation in December in America．It took him three months to recover(康复)and train there．It is
said that some doctors are ready in Shanghai to help with Liu's recovery．Liu left the 2008 Beijing
Olympics because of his foot injury(损伤)last August．
1．The name of the president's dog is .
A．Washington
B．Bo
C．Malia
D．Obama
2．How old is the dog?
A．Two months old
B．Three years old
C．Six months old
D．Six years old
3．How did the elephant lose his front leg?
A．She had a traffic accident．
B．She stepped on the landmine．
C．She was ill．
D．She fell into a big hole．
4．Liu Xiang had his foot operation in .
A．China
B．America
C．Japan
D．Australia
5．Liu Xiang left the Beijing Olympics because ．
A．he was afraid of the other players
B．he was too nervous to take part in it
C．his coach told him to do that
D．his foot hurt