粉路图中，2S表示第2道尾磨。

下列量具中，哪些是属于专用量具：游标卡、螺纹规、圆角规、外卡钳A、螺纹规B、游标卡尺C、圆角规D、外卡钳

单项选择题下列量具中，哪些是属于专用量具：游标卡、螺纹规、圆角规、外卡钳

在一个生长轮内，环孔材的早材管孔比晚材管孔显著为大，并沿着生长轮呈环状排列一至数列。

判断题在一个生长轮内，环孔材的早材管孔比晚材管孔显著为大，并沿着生长轮呈环状排列一至数列。

An investor has the choice between two investments. Inv...

单项选择题An investor has the choice between two investments. Investment Exe offers interest of 4% per year compounded semi-annually for a period of three years. Investment Wye offers one interest payment of 20% at the end of its four-year life. What is the annual effective interest rate offered by Investment Exe and Wye?
A、4.00% 4.66%
B、4.00% 5.00%
C、4.04% 4.66%
D、4.04% 5.00%