亚急性感染心内膜炎的赘生物最常见的附着部位是
A．三尖瓣边缘B．二尖瓣和主动脉瓣C．肺动脉瓣边缘D．三尖瓣基底部E．以上都不是
参考答案：B
She often asks her son _____ too much meat. [ ]
A. don't eat
B. not to eat
C. not eat
D. to not eat
见证取样检测
