目前最常用的定性鉴别的方法是（）
A.红外光谱法
B.分析性色谱
C.薄层色谱法
D.气相色谱法
E.制备性色谱
参考答案：C
流行性腮腺炎并发脑膜脑炎时，患者的临床表现为（）
A.发热
B.易惊厥
C.颅内压增高
D.颈强直
E.脑脊液葡萄糖正常
— Jack, could you tell me _____?
— Sure. In the post office on Green Road. [ ]
A. where you bought the stamps
B. where did you buy the stamps
C. when you bought the stamps
D. when did you buy the stamps
