题目

_____ his knowledge of the mountainous country, John Smith was appointed as our guide.A. In spite of       B. On account of       C. Regardless of       D. Instead of   答案：Bon account of 由于，因为;regardless of不顾。（2010?泉州）甲、乙两种固体物质的溶解度曲线如图所示，下列说法正确的是（　　）A．20℃时，甲和乙的溶解度都是30gB．40℃时，甲的溶解度小于乙的溶解度C．升高温度能使乙的不饱和溶液为饱和D．40℃时，在100g水中加入40g甲，所得溶液是饱和溶液