麻黄粉末应检出（）
A.表皮细胞及气孔
B.角质层突起
C.油管
D.嵌晶纤维
E.菊糖
参考答案：A, B, D
— Would you like to join us in a field trip this weekend?
— I’d like to. But I can’t ______ the time because I have an important exam to take on Monday.
A．kill
B．take
C．afford
D．spend
纵向并购
