【简答题】浅基坑土方开挖中,基坑边缘堆置土方和建筑材料,最大堆置高度不应超过( )m。
【简答题】在关系模式R(U,F)中,Y为非主属性,对任何非平凡的函数依赖X→Y,X均包含码,则R属于 。
【单选题】Which is not right to describe the Prime Minister in Britain?
B.
the head of civil service
C.
the leader of the party in power
D.
the head of the country
【单选题】The current Prime Minister in Britain is .
【单选题】在关系模式R(U,F)中,Y为非主属性,对任何非平凡的函数依赖X→Y,X均包含码,则R属于( )。
【判断题】Mrs. Thatcher is the second woman prime minister in Britain,
【单选题】In Britain,the Prime Minister is appointed by
【判断题】In Britain, the Prime Minister is elected directly by the people.