结晶器内的钢水凝固传热方式为:()。A.传导和对流为主 B.辐射为主 C.对流和辐射 发布时间:2017-11-16 13:32 │ 来源:www.tikuol.com 题型:单项选择题 问题: 结晶器内的钢水凝固传热方式为:()。A.传导和对流为主B.辐射为主C.对流和辐射为主
题型:单项选择题 In a twin screw ship going half-ahead , both screws turning outboard and the rudder amidships,no current or wind,the vessel will().A.move bodily to portB.move bodily to starboardC.move in a zig-zag motionD.steer a fairly straight course 查看答案