癌症，腰痛，腰腹部可触及肿块，五心烦热，口于，小便短赤，大便秘结，消瘦乏力，舌质红，苔薄黄少津，脉细数。辨证应属（）

A．膀胱癌湿热蕴毒证

B．膀胱癌瘀血内阻证

C．膀胱癌脾肾两虚证

D．膀胱癌阴虚内热证

E．大肠癌湿热郁毒证

“safe speed” is defined as that speed where（）.

A.you can stop within your visibility range

B.you can take proper and effective action to avoid collision

C.you are traveling slower than surrounding vessels

D.no wake comes from your vessel