下列保险的险别中,承保范围最大的是( )。
A.附加险
B.一切险
C.水渍险
D.平安险
参考答案:B
These aren't my keys. Mine _____ in the drawer.[ ]
A. is
B. are
C. am
D. were
换热器的允许压降值是多少?