对咽喉、消化道有不良刺激的药物入煎剂宜
A.先煎B.后下C.包煎D.另煎E.烊化
参考答案:C
解析:对咽喉、消化道有不良刺激的药物入煎剂宜包煎,以减少对咽喉、消化道的刺激。
Did your friend send you something ___ the end of last week? [ ]
A. at
B. by
C. in
D. to
已知正六棱锥底面的边长为2cm,侧棱长为4cm,求正六棱锥的体积。