单纯二尖瓣狭窄患者可有( )。
A.左房扩大,右房缩小
B.右房扩大,左房缩小
C.右室缩小,左房扩大
D.左室缩小或正常,左房扩大
E.左房扩大,左室扩大
参考答案:E
— I won’t choose either of the two shirts. They are too large for me.
— Well, I a small one for you.
A. was fetching B. fetched C. will fetch
请举出一个有关纳米技术应用的例子: