题目

下列有关规范实验操作的叙述不正确（    ）              A.严禁未经清洗的滴管再吸取其它试剂 B.禁止向正燃着的酒精灯里添加酒精  C.不得用手接触药品,更不得品尝任何药品的味道  D.实验用剩余的药品要放回原瓶 答案：D“How does he often go to school?” “ ”A. By a bike B. By his bike C. On his bike