采用KTB顶吹氧工艺,提高了RH前期脱碳速度,脱碳速度常数是原来的()倍。
A.0.8
B.1.2
C.2.0
D.1.7
参考答案:D
208. His _________, his sister's son, was admitted to Beijing University this year.
A.cousin
B.niece
C.nephew
D.Grandson
下列属于“负荆请罪”典故中的人物有()。
A、廉颇
B、蔺相如
C、楚申君
D、信陵君