题目

76. He cut the apple ________, and gave the big to his little sister.  A.into half                    B. into halves             C. in halves               D. in the half 答案：B下列跟红磷和白磷的关系相同的一组物质是A．和B．和C．正丁烷和异丁烷D．金刚石和石墨