慢性阻塞性肺气肿的体征,下列哪一项是错误的()。
A.桶状胸
B.语颤增强
C.心音遥远
D.呼吸音减低、呼气延长
E.肝浊音界下移
参考答案:B
It is uncertain ________ side effect the medicine will bring about, although about two thousand patients have taken it.(2010·浙江)
A.that
B.what
C.how
D.whether
简述详查阶段主要任务。