小儿较成人容易发生脱水是因为()
A.水代谢旺盛
B.体表面积相对小
C.消化功能差
D.尿量多
E.细胞外液相对少
参考答案:A
Young boy as he is, Tom could _____ himself properly, isn't it amazing?[ ]
A. wear
B. put on
C. have on
D. dress
市场细分有什么作用?