【判断题】The purpose of the logical design is to design a model which can be appropriate to certain model, suppose to relational database, the logical design is aimed to design a relational model.
【单选题】某商品由上海港海运至美国洛杉矶港(Los Angeles,US),托运人应查询下列)()航线的船期表和运价表。
【单选题】There are times when one wants to be surrounded by people; there are also times when one needs solitude .
B.
the state of being alone
【简答题】Why need simplify the logical function? How many expression ways of the st form for the same Boolean function? Which one is the normal expression?
【单选题】生球干燥过程中,干燥介质的温度与流速决定于生球的( )。
【单选题】下列实验现象描述正确的是( )
A.
硫粉在空气中燃烧时,发出蓝紫色火焰,生成具有刺激性气味的气体
B.
涤纶和羊毛纤维点燃后,都可以闻到烧毛发的气味
D.
将CO 2 通入紫色石蕊溶液中,溶液变为红色