毕欧准数B.i与下列哪一个因素无关。（）
A.钢坯的导热系数
B.钢坯的长度
C.钢坯的厚度
D.炉膛对钢坯的给热系数
参考答案：B
Which of the following sentences is wrong?
A．What will you do with the old books?
B．How will you deal with the old books?
C．This box is too heavy to carry.
D．We are looking forward to see the famous singer.
采煤安全质量标准化要求，瓦斯浓度不超限，工作面温度超过（）应采取降温措施。
A.26℃
B.28℃
C.30℃
