纸张的化学性能一般包括：（）
A.水分
B.酸碱度
C.灰度
D.铜价
E.粘度
参考答案：A, B, C, D, E
回答问题。
1. What is the weather like today?
___________________________________.
2. Is it cold?
__________________________________.
3. Can you wear your T-shirt today?
4. What animal do you like?
5. Do you like pandas?
_________________________________.
无线对讲机用天线
