某一中药水溶液具有发泡性和溶血性原因可能是含有哪类成分所致()
A.环烯醚萜
B.二葸酮
C.黄烷醇
D.木脂素
E.皂苷
参考答案:E
解析:
发泡性和溶血性是皂苷的特性。
Tom received an invitation to dinner, and with his work ____, he gladly accepted it.
A.finished
B.finishing
C.having finished
D.was finished
非法定单位1美加仑等于()升。
A.4
B.3.7
C.1/4
D.3.785