人耳可听到的声音频率范围是()
A．1～20Hz
B．5～20Hz
C．5Hz～5kHz
D．16Hz～20kHz
E．20kHz以上
参考答案：D
Making mistakes is a part of life. ________ matters is _________ you do afterwards.
A．It; what
B．All; what
C．What; what
D．That; what
上下运动神经元性瘫痪的临床特点？
