Not only should you get used _________ under difficult conditions but also you should pay more attention _________ your work well. A. to work; to do B. to working; to doing C. to work; to doing D. to working; to do 答案:B
碘是紫黑色晶体,可以溶解在汽油中,形成紫红色溶液.
(1)碘溶解到汽油中,形成的溶液属于________(填“纯净物”或“混合物”),它具有________性和________性两大特征.
(2)甲、乙、丙三个同学分别画出下面的示意图,表示溶液中碘分子的分布.(提示:汽油分子没有画出)
①如果乙同学的示意图符合事实,应该观察到的现象是________________;
②根据你在实验中观察到的现象,________(填甲、乙、丙)的示意图符合事实.