在关系代数中专门的关系运算包括选择，投影、______、除等运算。
参考答案：连接
The little girl who got lost decided to remain _________she was and wait for her mother.
A．where
B．what
C．how
D．who
借款人将债务全部或部分转让给第三方的，应当取得银行的同意。( )
