容易闻及二尖瓣杂音的体位是( )
A．坐位B．立位C．平卧位D．有侧卧位E．左侧卧位
参考答案：E
—Something to drink?
—Yes, ________.
A．two glass of milk
B．two glass of milks
C．two glasses of milks
D．two glasses of milk
简述钙硫比对脱硫效率的影响？
