雏鹅指孵化出壳后至（）周的鹅。
A、4
B、6
C、8
参考答案：A
—Would you like to have dinner with me?
—______.
A. That’s all right B. Certainly not C. Yes, I’d love to
表面活性剂在药剂学中不能用于
A．增溶
B．助悬
C．润滑
D．乳化
E．防腐
