脂蛋白各组分中密度最大的是（）
A.IDL
B.HDL
C.VLDL
D.LDL
E.CM
参考答案：B
— How was your trip?
— It was _____. I didn't enjoy it at all. [ ]
A. terrible
B. rainy
C. great
D. pleasant
三度房室传导阻滞可出现的是（）
A.开瓣音
B.收缩早期喀喇音
C.心包叩击音
D.大炮音
E.钟摆律
