耐张段长度超过800m时，一个耐张段内正馈线接头的总数量安全值为（）。
A、0个
B、2个
C、4个
D、8个
参考答案：C
Try as you _______, he won't listen to your advice on the potential dangers of smoking. [ ]
A. can
B. may
C. dare
D. will
易引起出血的邪气是
A．风B．寒C．湿D．燥E．火
