内痔的主要症状是
A.便秘、便脓血、脱出
B.便后肛门疼痛、便血
C.便血、脱出、周期性疼痛
D.便血、脱出
E.便秘、便血、便脓
参考答案:D
By this time next summer, you ___ a high paying job. I, on the other hand , will still be studying for my degree.
A.will have found
B.will find
C.have found
D.will be finding
对5类对绞电缆应在终接时,尽量保持(),其()应不大于13mm。
A.双绞状态
B.对绞状态
C.非绞状态
D.并行状态