题目

 People who often stay up too late are more likely to die of heart disease, _____ a study. A. with the help of  B. because of   C. according to   D. as a result of 答案：C某同学设计了这样的实验：他将小麦种子分为等量的两组，给予适量的水，适宜的温度，一组放在阳光下，另一组放在黑暗透气的纸盒里，他想要探究的问题是（ ）A．水分对小麦种子萌发是否有影响B．光照对小麦种子萌发是否有影响C．空气对小麦种子萌发是否有影响D．温度对小麦种子萌发是否有影响