题目

听下面一段独白，回答以下小题。【1】When was Greenpeace founded?A. Twenty years ago. B. Fifty years ago. C. Seventy years ago.【2】What role does the man play in the organization?A. He is the action organizer. B. He is a leading nuclear scientist.C. He is one of the plan makers.【3】What has the man been involved in recently?A. Protesting the use of nuclear weapons. B. Protecting animals and plants.C. Environmental campaign.【4】How did people react to the man’s appeal last week?A. They showed little interest in it. B. They were against the demonstration.C. They express高氯酸钾（KClO4）可用作火箭推进剂，其溶解度如下表，下列说法正确的是温度/℃20406080溶解度/g1.683.737.313.4A.高氯酸钾的溶解度随温度升高而减小B.20℃时，将2g高氯酸钾溶解于98g水可配制2%的溶液C.60℃时，高氯酸钾饱和溶液中溶质的质量分数是7.3%D.80℃的高氯酸钾饱和溶液冷却至40℃有结晶现象