【单选题】Speech act theory did not come into being until _________.
A.
in the late 50’s of the 20th century
D.
in the early 21st century.
【判断题】容积率是居住建筑基地面积与居住建筑用地面积之比。
【简答题】建筑高度超过( )m,无论是居住建筑还是公共建筑,均称为超高层建筑。
【简答题】关系表达式的值非真即假。当关系表达式成立时,关系表达式的值为 (真);当关系表达式不成立时,其值为 (假)
【单选题】Speech act theory did not come into being until __________.
D.
in the early 21st century
【单选题】Speech act theory did not come into being until ________.
D.
in the early 21st century
【单选题】We have a bad . 信号不太好。
【多选题】“非”表示若原表达式成立,则语句 ;若原表达式不成立,则语句 。