当水深超过（含）（）米时，一般可不进行水位改正。A、100 B、200 C、300

结合生活经验，对式子（+6）+（-9）=-3作出解释：______．

心室发生心肌梗塞可引起心室壁舒缩协调障碍。

Though Alice is busy, music has always been _______ her work.[ ]

A. as much a part of her life as                

B. as a part of her life much as

C. as much as a part of her life                

D. so much a part of her life as

硫酸盐检查法的显色剂（）。

人体内物质新陈代谢的调控与主宰是

A．血

B．肾

C．气

D．神

E．心