题目

34.  ---It has been raining these days. _____ the sports meeting will be put off. ---Yes. It all depends on the weather. A. I’ve been told      B. I’ve told       C. I’m told            D. I told 答案：A响度跟声源振动的______有关，响度还跟______有关，两手做成喇叭状高喊是为了通过反射回声______，从而增大声音的响度．