在一定条件下,交易所会员的交易席位可以转让,但不得退回。 ( )
参考答案:对
The thought _______ he would open a Sichuan restaurant in Los Angeles surprised his wife.
A.that
B.what
C.whether
D.when
矿井排水设备的选择计算主要任务包括哪些内容?