题目

小华在家修理厨房里的桌子,不停的有敲击物体的声音发出,为了使隔壁的小明学习时免受干扰,小华采取了三种方案:①在被敲的地方垫一块抹布;②把房间、厨房门窗关闭关严;上述二种方案中,第一种是在处减弱噪声;第二种是在中减弱。 答案:【1】声源处【2】传播过程中—What did the doctor say yesterday afternoon?—He said, “______ on time, this medicine will be quite effective.”A. Taking B. Being takenC. Taken D. Having taken
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