题目若 (CF)(H, E)=0.8 且 (CF)(E)=0.9，则 (CF)(H)=?A. 0.72B. 0.8C. 1.7D. 0.9若 $\text{CF}(H, E)=0.8$ 且 $\text{CF}(E)=0.9$，则 $\text{CF}(H)=$?A. 0.72B. 0.8C. 1.7D. 0.9题目解答答案A. 0.72