花岗石具有（）特性。
A．耐酸、耐火
B．耐酸、不耐火
C．不耐酸、耐火
D．不耐酸、不耐火
参考答案：B
王大伯承包了25亩土地，今年春季改种茄子和西红柿两种大棚蔬菜，总支出44000元．其中种茄子每亩支出1700元，每亩获纯利2400元；种西红柿每亩支出1800元，每亩获纯利2600元．问王大伯一共获纯利多少元？
-I can’t go with you today. There will be a test tomorrow.
- ______. Maybe next time.
A．It doesn't matter
B．My pleasure
C．I don’t think so
D．You are welcome
