题目

 Brendan hurriedly got to the airport, only ______ the plane had taken off. A. to find                  B. to finding                  C. to be finding             D. to have found 答案：A实验室中有下列实验用品:①酒精灯、②试管夹、③10 mL量筒、④100 mL量筒、⑤烧杯、⑥石棉网、⑦药匙、⑧玻璃棒、⑨铁架台(带铁圈)、⑩胶头滴管,请按要求选择相应实验用品(填序号)。(1)加热试管里的药品应使用___________。(2)量取5 mL液体应使用___________。(3)加热25 mL水应使用___________。(4)取用少量粉末状药品应使用___________。