计算：（1）2-1+4-38+(2)0；（2）(-3)2-3-64-(3)2-|

阅读理解。

     I have twin brothers, Tim arid Tom.  They look the same and a lot of people don't know which twin

is which.  They both have brown hair and blue eyes, and always wear jeans and T-shirts.

    They like wearing the same things, and they like doing the same things,too,For example, they both like

pop music, football and computers. They go to a football match every Saturday.  They'd like to play

computer games every night,,but  our mother says they can't because they have a lot of homework.

    They are twins, but they aren't the same in every way.  For example,Tim works hard at school, but

Tom doesn't.

    Our mother is often away from home because she travels a lot in her job,so we all help in the house.

    I think it's fun to have twin brothers.

1. My lwin brothers both have______hair and______eyes and always wear jeans and T-shirts.

A．red, black    

B.  white, grey

C. brown, blue    

D.  yellow, purple

2.  Tim and Tom both like______.

A.  pop music, model robots    

B.  computers, pop music

C. football, homework    

D.  housework, computers

3.  They go to a football match every______.

A. Friday    

B.  Saturday    

C.  Sunday    

D.  holiday

4. Tim______,but Tom doesn't.

A. sings well    

B.  can send e-mails at home

C. works hard at school    

D.  plays football very well

5.______often travels and doesn't often stay at home.

A.  The writer  

B.Tim    

C.Tom    

D.Their mother

当测者位于两极，下述现象（）正确。

A．时角变化与赤纬变化相等

B．方位变化与高度变化相等

C．赤纬变化与高度变化相等

D．时角变化与高度变化相等

錾子一般用T7A或T8A材料制成，在热处理时加热温度一般为（）。

A、450℃～500℃；

B、500℃～600℃；

C、600℃～750℃；

D、750℃～780℃。

医院健康促进的目标人群是（）。

A.患者

B.患者及患者家属

C.患者及医院职工

D.患者、医院职工及所在社区的居民

E.处于亚健康状态者

在我国开征土地增值税的作用有哪些？