下列的微生物中，能将复杂有机物分解成简单无机物的是[ ]
A．病毒
B．蓝藻
C．蘑菇
D．根瘤菌
答案：C
急性心肌梗死的超急期心电图改变是
A．ST段明显抬高
B．异常宽深的Q波
C．T波高耸
D．T波倒置
E．R波降低
He was always finding________with his daughter's friends.
A．blame
B．error
C．mistake
D．fault
