题目

— I'm afraid I've lost your e-mail address.— Well, ______; I can easily write you another one. A . never mind B . that's right C . you're careless D . don't say sorry 答案：A下列化学实验的操作中，不正确的是 [     ]A．给烧杯加热时，要垫上石棉网 B．给试管里的液体加热时，液体体积不超过试管容积的三分之一C．用托盘天平称量易潮解的药品时，药品应该放在玻璃器皿里称量D．实验中剩余的药品都要都要放回原试剂瓶