信用条件是指公司要求客户支付赊销款的条件，一般包括（） ["信用期限","现金折扣","折扣期限","坏账损失率"]
在加工、制造模具前，应做好哪三方面生产技术准备？
（） is the breakdown of surface tension between oil droplets in an oil water mixture which causes them to join and increase in size. ["Wear","Contaminating","Coalescence","Coarse separating"]
简述尺蠖鱼蛭病的流行情况。
异地办理身份证号码升位是否要收取异地特殊业务手续费（）。 ["免收","按异地特殊业务收费标准收取","视客户所持卡片种类决定"]
双动拉伸模上的外滑块、内滑块各起什么作用？
