平均含碳量小于或等于0.25%的钢属于().
A.高碳钢
B.中碳钢
C.低碳钢
D.低合金钢
参考答案:C
The money collected should be made good use ________ the people in Taiwan who suffered a lot in the
earthquake.[ ]
A. of helping
B. to help
C. to helping
D. of to help
S200设备支持E1透传DCC(此处是相对于物理层).:固定在E1物理口的第()路。