因式分a2+2a=______．

     Mike is a teacher in a middle school in Toronto. He teaches Math(数学). He comes from America.

His father and mother aren’t in Australia. They are in America.    

     Toronto is a very nice and Mike likes it very much. His school is also(也) very beautiful. The other

teachers and the students are all very friendly. On Sundays Mike often goes to the People's Park(人民

公园) with his Chinese friends. He can speak a little Chinese. He often talks with his Chinese his friends.

He is very happy in Toronto.

根据短文内容，判断下列句子正误。

( )1. Mike is in Shanghai with his parents.

( )2. Mike is form England.

( )3. The people in his school are very friendly.

( )4. Mike likes Toronto but he doesn’t like his school.

( )5. Mike can speak a little Chinese.

国家对违法犯罪的未成年人坚持( )的原则。

A．从严从重处罚

B．教育与处罚并重

C．不承担法律责任

D．教育为主，惩罚为辅

E．惩罚为主，教育为辅

子釣而不鋼，弋不射宿。（《論語·述而》）

在发生火灾时，未成年人要坚持（）的原则

A、先救火后逃生

B、先逃生

C、边救火边逃生

D、灭了火再说

炒后毒性降低的药物是（）

A.苍耳子

B.槐花

C.决明子

D.王不留行

E.酸枣仁