慢性阻塞性肺气肿的体征，下列不正确的是（）。
A．肺肝浊音界下移
B．心音遥远
C．呼吸音减低
D．胸膜摩擦音
E．桶状胸
参考答案：D
_______ mainly for the invention of the telephone, Alexander Graham Bell devoted his life to
helping the deaf. [ ]
A. Remembered
B. To be remembered
C. Having been remembered
D. Though remembered
