耳痛为主要临床症状()
A.急性化脓性中耳炎
B.分泌性中耳炎
C.慢性化脓性中耳炎单纯型
D.慢性化脓性中耳炎骨疡型
E.中耳胆脂瘤
参考答案:A
You _____ the flowers more water so that they can grow well now.
A.would have given
B.might have given
C.must have given
D.should have given
粉尘可以分为由机械过程产生的和()化学过程产生的两类。