实现语文教学最优化，必须依靠语文学科的（）
A.工具性
B.思想性
C.工具性与思想性的统一
D.主观能动性
参考答案：C
Even though the producer surplus increases under a monopoly scenario, relative to one of perfect competition, the consumer surplus :（）
A. decreases by a lesser amount.
B. decreases by a greater amount.
C. decreases by an equal amount.
切梗丝前烟梗温度低于（），表面无水渍。
