34 36 35 35 34 37 _________ ( )
A．36 33
B．33 36
C．37 35
D．35 37
参考答案：A
—Where is your manager?
—Sorry, he is ____ for my company.[ ]
A. travel
B. trip
C. on business
D. tour
（）属于脱氧不完全的钢。
A、镇静钢
B、半镇静钢
C、沸腾钢
