题目

 He kept begging his parents for a new bag, and they finally _______. A. gave up      B. gave in          C. gave out        D. give away 答案： B取用药品时，没有说明用量，液体取1mL～2mL1mL～2mL；托盘天平能称准到0.1g0.1g；向酒精灯添加酒精，不能超过酒精灯容积的2323；给试管里液体加热．液体体积不要超过试管容积的1313；同时试管倾斜约45°角45°角．