带压开孔封堵作业管件组对时，对开三通（对开四通）法兰沿管道轴线方向的两端到管顶的距离差不应大于（）mm.
A、1
B、2
C、3
D、4
参考答案：A
_____ new teaching building in our school was completed in _____ October of 2003, not in
_____August.
A．The; the; /
B．A; /; /
C．A; the; the
D．The; /; /
Though suffering a serious injury, Rafael Nadal refused to _______ the game and went on.
A．give out
B．give in
C．give up
D．give off
