极限
等于( )。
A．5
B．
C．3
D．0
参考答案：B
Smiling doesn't mean you're happy． Sometimes, it just means that you're strong enough to face problems．
A．fortunately
B．eventually
C．deliberately
D．necessarily
变压器有载开关油枕油位正常，并略（）变压器本体储油柜油位。
A.高于
B.低于
C.等于
等于( )。
等于( )。