可直接反映LDL水平的物质是（）
A.apoA-I
B.TG
C.TC
D.CM
E.apoB
参考答案：B
—I like the photo I took on the beach yesterday. What do you think of it?
—Well, really nice!
A．where
B．when
C．which
D．who
A．若磁场正在增强，则电场能正在减少，电容器上极板带正电
B．若磁场正在减弱，则电场能正在增强，电容器上极板带正电
C．振荡电流的变化周期为：2π
D．电场能量的变化周期为：π
