—Where is her notebook?
—Look! It's _____ the floor.
A. on
B. in
C. at
D. by
答案:A
子宫内膜癌主要诊断方法是
A.诊断性刮宫
B.宫腔镜检查
C.分段刮宫
D.脱落细胞学检查
E.B超检查
产品差异市场营销