正常二尖瓣口面积大约是
A.1cm2B.小于1.5cm2C.2cm2D.3cm2E.4~6cm2
参考答案:E
沉香散4功效与作用
A 15-ton bulldozer employed caused the bilge limber boards on both sides().
A.serious damaged
B.seriously damage
C.serious damage
D.seriously damaged