具有“雁脖芦”、“枣核汀”“铁线纹”等特征的药材是（）。
参考答案：野山参
---- Where have you been all day?
---- I _____ some former classmates and I couldn’t get back until it was dark. [ ]
A. have met
B. met
C. would meet
D. had met
当国民经济中的生产能力过剩时，最好采取（）
A、扩大总需求
B、扩大总供给
C、扩大总需求和总供给
D、扩大总需求或总供给
