【单选题】The shipment time is June or July at our () and the goods will be shipped in one ().
【简答题】影响燃气燃烧特性的主要参数是 、 和 。
【单选题】在PLC自控系统中,对于压力输入,可用()扩展模块
【单选题】在PLC自控系统中,对于压力输入,可用什么扩展模块
【判断题】The goods will be shipped by air.
【单选题】Frank picked several books ______ and then started reading.