路由器()快速闪烁说明正在交换数据。
A.ACT灯
B.COL灯
C.FDX灯
D.OK灯
参考答案:A
The risk-free interest rate is 5 percent, and the return on market portfolio is 8 percent. A stock with a beta of 0. 5 that has an estimated rate of return of 7 percent is most likely:()
A. overvalued.
B. undervalued.
C. correctly valued.
垂直线性良好的超声波探伤仪,用0°探头发现同一对比试块上的某一平底孔回波,比同声程处φ3mm平底孔回波低7dB,则该平底孔约为()。
A、φ1mm
B、φ1.5mm
C、φ2mm
D、φ2.5mm