肠道细菌的分离培养所需培养基为以下哪种()
A.巧克力琼脂培养基
B.麦康凯琼脂培养基
C.戊烷脒选择性培养基
D.改良柯小夫培养基
E.三恩培养基
参考答案:B
He is very popular among his students as he always tries to make them __________ in his lectures.
A.interested
B.interesting
C.interest
D.to interest
室间隔缺损的临床分级,主要是以下列哪项为依据().
A.肺动脉压力
B.左向右分流量
C.全肺阻力
D.心电图改变
E.以上都是