表示曲线下的面积的是（）
A.Css
B.t1/2＝0.693／K
C.CL＝KV
D.V＝X0／C0
E.AUC
参考答案：E
Facing the poor grades, Maria is wondering what it ___ to learn English well.
A．takes
B．uses
C．makes
D．prepares
IEEE802.3X是VLAN的标准
