贫血最常见的类型是( )
A．再生障碍性贫血
B．铁粒幼细胞性贫血
C．缺铁性贫血
D．慢性炎症性贫血
E．珠蛋白合成障碍性贫血
参考答案：C
Dogs are too _____ to take care of.
A．difficult
B．more difficult
C．most difficult
D．the most difficult
其他无机化合物、压缩空气等
