题目

The visitor ________ that he ________ very glad to visit our country. A . said; was B . said; had been C . told; was D . spoke; had been 答案：A常温下，在15克氯化钠中加入60克水，完全溶解后，溶液中氯化钠的质量分数为(   ) A.20%               B.15%                   C.25%               D.33.3%