一个圆柱的侧面展开图是一个边长为8厘米的正方形,这个圆柱的侧面积是______平方厘米.
8×8=64(平方厘米);
答:这个圆柱的侧面积是64平方厘米.
故答案为:64.
I first met Lisa three years ago when we __________ at a radio station together.[ ]
A. have worked
B. are working
C. were working
D. worked
常用于原发性肝癌诊断的肿瘤标志物是
A.PSAB.AFPC.CA125D.CA15-3E.CA19-9