小儿20kg，年龄大约为（）
A.6岁
B.5岁
C.4岁
D.3岁
E.7岁
参考答案：A
Her hobbies, Jane likes fishing( ), but she doesn't eating fish.
A．From all; better
B．For all; best
C．About all; better
D．Of all; best
采煤工作面顶板事故可分为哪些类型？
