陶瓷锦砖耐酸度指标______。
A．＞80%
B．＞84%
C．＞90%
D．＞95%
参考答案：D
— Sorry, I can't work out this problem.
— Try again, please. It's only difficult. [ ]
A. a bit
B. a lot
C. very
D. much
客户与产品之间的关联是供应链上增加生存能力和获得男篮的一种有效方法（）
