单项选择题

碳素钢的含碳量为多少

A.0%
B.0%
C.35%
D.35%

你可能感兴趣的试题

单项选择题

经济适用住房建设用地以（）方式供应

A、划拨
B、出让
C、租赁
D、赠予

__________________(absorb) in painting，John didn"t notice evening approaching.

答案： Absorbed in painting, John didn't notice evening approaching...