房地产转让合同、房地产抵押合同和房屋租赁合同均为要式合同。( )
参考答案：对
–The classroom is_____ clean_____ it was yesterday.
--Sorry, I forgot to clean it.
A．as, as
B．so, as
C．not so, as
D．more, than
交流主汇流条正常由谁供电（）
A.交流汇流条1；
B.交流汇流条2；
C.应急发电机
