一、选择题1.关于声波,下列说法正确的是A.常温下人耳能听到的声音波长范围是1.70mm-17.0mB.同一频率的声波在金属里传播的波长比空气里要长C.敲响一音叉,使音叉缓慢旋转,听其声音,这是声波的衍射现象D.在空房子里讲话,余音缭绕,这是声波多次反射所致,称为交混回响2.下列方法可 First, multiple-choice questions 1. About sound waves, the following statement is correct A. At room temperature, the human ear can hear the sound wavelength range is 1.70mm-17.0mB. The same frequency of sound waves in the metal propagation wavelength longer than air C A ringing fork makes the tuning fork rotate slowly and listens to its sound. This is the diffraction phenomenon of the sound wave. D. Speaks in an empty house and lingers over it. This is caused by multiple reflections of the sound wave, called reverberation. 2. The following method can