表示变压器油化学性能好坏的主要参数之一是()。
A.绝缘强度
B.酸值
C.介质损耗因数
参考答案:B
饰面砖粘贴工程常用的施工工艺是( )。
A.满粘法
B.点粘法
C.挂粘法
D.半粘法
—Our holiday cost a lot of money.
—Did it? Well, that doesn't matter ________ you enjoyed yourselves.[ ]
A. as long as
B. unless
C. as soon as
D. though