A:Y的溶解度曲线为b曲线
B:降温可使X的饱和溶液变浑浊
C:X的饱和溶液从t2℃降温到t1℃,溶质的质量分数变大
D:t3℃时,X、Y的饱和溶液质量相等,则溶剂质量X>Y
-- What's wrong, Daming?
-- Oh, I feel sad to hear more than _______ people lost their lives in the earthquake in Sichuan at 2:28 on the afternoon of May 12, 2008.
读图,完成下列要求.
某校园内设置了“小草依依,踏之何忍”的提示语牌,以提醒人们不要践踏小草,否则会造成土壤板结,而影响草的生长.其主要原因是( )