血浆中和动脉粥样硬化的发生呈负相关的脂蛋白是（）
A.CM
B.VLDL
C.IDL
D.LDL
E.HDL
参考答案：E
通气改善率测定中提示气道阻塞中度可逆的标准是（）。
A.10%
B.>15%
C.15%～24%
D.25%～40%
E.>40%
The researchers who study jokes want to know people from different nations and cultures find funny.
A．why
B．that
C．what
D．whether
