急性肾盂肾炎的合并症不包括（）
A.急性坏死性 * * 炎
B.肾盂积脓
C.肾周围脓肿
D.肾结石
E.急性膀胱炎
参考答案：D
If a profit maximizing firm finds that its marginal revenue exceeds its marginal cost, it should:（）
A. increase output if it is a price taker, but not if it is a price searcher.
B. decrease output, regardless of whether it is a price taker or a price searcher.
C. increase output, regardless of whether it is a price taker or a price searcher.
