在气体渗碳的排气阶段,通常以加大煤油量来迅速排气,此时炉温应达到()。
A.650℃以上
B.750℃以上
C.850℃以上
参考答案:C
时邪毒盛,流行广泛,可煎服()
A.肺阴虚
B.咳嗽、咳血、潮热、盗汗
C.咳吐、浊唾涎沫
D.肺阴亏损
E.肺痿
_______ that saw the rise of quite a number of new writers. [ ]
A. During the first half of the 18th century
B. That it was in the first half of the 18th century
C. It was in the first half of the 18th century
D. It was the first half of the 18th century