________ he is ,he seldom shows his precious coins to others.

A．Coin -collector as

B．As a coin -collector

C．A coin- collector as

D．Coin- collector that

有关优势半球的概念正确的有（）

A.多为左侧大脑半球

B.多为右侧大脑半球

C.为语言功能占优势的一侧大脑半球

D.少年时受损可在对侧重建

E.与用哪只手劳动的习惯无关