【简答题】This is where John once lived.
【简答题】A.Where John will meet her. B.What the topic of the meeting is. C.What John is wearing. D.Where the meeting is being held.
【判断题】本实验校正酸度计,所选用的缓冲液组 是“ 1.68 , 4.01 , 6.86 , 9.18 , 12.46 ”。( )
【简答题】C#中的变量必须先声明后使用。声明变量包括变量的名称、( )以及必要时指定变量的初始值。
【单选题】David______for a while and went to where John stood with Susan.