题目

—Many boy students think math is ______ English.  —I agree. I’m weak in English.   A. much difficult than                              B. so difficult as    C. less difficult than                                 D. more difficult than 答案：C盲人的手指可以“阅读”盲文．盲人的“阅读”主要依靠的是皮肤中的（ ）A．冷觉感受器B．触觉感受器C．痛觉感受器D．热觉感受器