嘌呤核苷的糖苷键是()
A.Cl’-N1糖苷键
B.Cl’-N9糖苷键
C.3’,5’-磷酸二酯键
D.二硫键
E.肽键
参考答案:B
I _________ her not to walk on the thin ice but she wouldn't listen.[ ]
A. suggested
B. hoped
C. warned
D. persuaded
右侧结肠癌最多见的大体形态是()
A.浸润型
B.溃疡型
C.肿块型
D.浸润溃疡型
E.弥漫型