①氯气的性质活泼，它与氢气混合后立即发生爆炸；
②实验室制取氯气时，为了防止环境污染，多余的氯气可以用氢氧化钙溶液吸收；
③新制氯水的氧化性强于久置氯水；
④检验HCl气体中是否混有Cl2的方法是将气体通入硝酸银溶液中；
⑤除去HCl气体中的Cl2，可将气体通入饱和食盐水．
A：①②③
B：②③④
C：③
D：③⑤
Yesterday was Sunday. Tom was at home. He got up at six o’clock in the morning. He had rice for breakfast. At eight he helped his mother do the housework. At nine he watched TV with his father. He cooked fish for lunch. At four in the afternoon he washed his clothes. He went to bed at ten in the evening.
如果幂函数y=m2-3m+3xm2-m-1的图象不过原点，则m的值是____
下列句子中有语病的一项是（ ）
母狼的幼仔丢失后会将人的婴孩哺育成狼孩，这个事实说明（ ）
