题目

已知样本: 那么频率为0.25的范围是A.5.5～7.5                             B.7.5～9.5C.9.5～11.5                           D.11.5～13.5 答案：D() 6. —Is Jack in the next room?—Well,it's hard to say. But I heard him loudly when I passed by just now. (2015湖北孝感)   A. speak   B. to speak   C. spoken   D. speaking