为使砂芯排气畅通,砂芯中可开设排气通道,配型时砂芯表面常刷一层()。
参考答案:耐火涂料
—Allen, your bedroom is in a mess.
—Sorry, Mum. I'll ______ my things at once.[ ]
A. put on
B. put away
C. put out
D. put up
什么是国际销售渠道模式的标准化与地区化?