题目内容
矿山企业的主要负责人每月带班下井不得少于（）个。
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nternational Transport Transport plays an important part in international business because goods produced have to be delivered to the buyers abroad, and the delivery of goods is to be made possible by transport services. Goods are carried by several means of transport on road or rail, by sea or air. And in recent years, combined transport which is a road-sea-rail carriage appeared. With the expansion of international trade, the container service has become popular. The use of containers provides a , highly effective form of transport . by road, rail and sea, Basically , orabout 98% of world trade is carried out by sea transport.Besides transport by sea, road, or rail, nowadays in order to speed up delivery, carriage by air international has also become popular. In recent years,combined transport which is a road-sea-rail carriage appeared.
激光视盘是一种可重写光盘。
常用冷作模具钢的牌号为（）
在系统测试时发现的逻辑错误属于（）。
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