【简答题】They are going to have the serviceman ________ an electric fan in the office tomorrow. A) install B) to install C) to be installed D) installed
【简答题】在中红外光区中,一般把4000~1350 区域叫作 ;而把1350~650 区域叫作 。
【判断题】世界海关组织对关境的定义是完全实施同一海关法的地区,有可能与国境不一致。
【单选题】They _______ this boy for quite a few days before they found him.
【判断题】世界海关组织对“国境”的定义是实施同一海关法规和关税制度的境域。
【单选题】01-43.___ him tomorrow
【判断题】影响光纤带宽的主要因素是光纤的色散,而光纤的色散越小,光纤的带宽越宽。
【单选题】Victor took a bus and headed for home, _____ if his wife would have him back.