卵巢内胚窦瘤()
A.AFP
B.ACTH
C.CA125
D.E2
E.β-hCG
参考答案:A
在未来现实树当中,它的"树根"是解决核心问题的方案,"树叶"是最终人们想看到的结果。
单项选择。
Mary often goes out _____ a walk ______ her mother after supper. [ ]
A. to, and
B. for, and
C. for, with
D. to, with