慢性单纯性鼻炎与慢性肥厚性鼻炎的区别是()
A．体征不同
B．病理改变不同
C．治疗方法不同
D．症状不同
E．治疗不同
参考答案：A, B, C, D
“六一”儿童节，张华买4枝笔比买1本课外书少花钱0.6元，每枝笔价格2.5元，每本课外书价格多少元？（列方程解答）
______ him well, I would have invited him to my birthday party.
A．Had I known
B．Should I know
C．If I know
D．If I knew
