题目

It was in that small house ________ was built with stones by his father ________ he spent his childhood. A . that; where B . which; that C . which; which D . that; which 答案：B下列微粒中与OH-离子具有不相同的质子数和相同的电子数，该微粒为(    )A.F－       B.Mg2＋     C.Cl－      D.K＋