题目

—Did David accept her invitation to watch that football game?—He______，but his favorite sport was basketball. A . might have B . could have C . should D . could 答案：A关于化学实验操作或实验事故处理的叙述错误的是A.碱液沾到皮肤上，要用较多的水冲洗，再涂上硼酸溶液B.点燃可燃性气体前，要检验气体的纯度C.直接将pH试纸浸入溶液中，测定溶液的pHD.为了防止污染环境，实验中废药品应放入固定容器中回收