题目

阅读理解 The Pacific island nation of Nauru used to be a beautiful place. Now it is an ecological disaster area. Nauru's heartbreaking story could have one good consequence — other countries might learn from its mistakes. For thousands of years, Polynesian people lived the remote island of Nauru, far from western civilization. The first European to arrive was John Fearn in 1798. He was the British captain of the Hunter, a whaling ship. He called the island Pleasant Island. However, because it was very remote, Nauru had little communication with Europeans at first. The whaling ships and o（2007?长沙）如图是甲、乙两种物质的溶解度曲线．在t2℃时往盛有100g水的烧杯中先后加入wg甲和wg乙（两种物质溶解时互不影响，且溶质仍是甲、乙），充分搅拌．将混合物的温度降低到t1℃．下列说法正确的是（ ）A．甲物质的溶解度随温度升高而减小B．乙物质的溶解度随温度升高而增大C．温度降低到t1℃时，甲、乙的溶质质量分数相等，得到甲、乙的不饱和溶液D．t2℃时，甲物质的溶液为饱和溶液，乙物质的溶液为不饱和溶液