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

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问题单项选择题

A．环烯醚萜
B．二蒽酮
C．黄烷醇
D．木脂素
E．皂苷

答案

参考答案：E

解析：发泡性和溶血性是皂苷的特性。

选择题

When he moved to Germany in _____ , he was already in _____ .[ ]

A. the 50s; his sixty

B. the 50s; his sixties

C. 50s; his sixties

D. 50s; his sixty

填空题

墙体按受力状况不同，可分为（）和（）两类。其中非承重墙包括自承重墙、隔墙、填充墙等。