癌症病理分级四级法中Ⅰ级是指未分化癌细胞占（）。
A.0～15%
B.0～25%
C.25%～50%
D.50%～75%
E.＞75%
参考答案：B
—What did you do on your last school trip?
—I _______ to the aquarium. [ ]
A. go
B. goes
C. went
D. going
证据本身的规则
