关于试带法测尿红细胞，错误的是
A、尿液中完整RBC可呈阳性反应B
暂无解析
Themachineis_______(控制)byarobotinsteadofaworker.
-Couldyoutellme_______?
-Untiltomorrowafternoon.
---Excuseme!Couldyoutellme____________?
---Sure.Gostraightandturnright.It’sdownBridgeStreetonyourleft.
---HowwasyourvacationinShanghai?
---Oh,__________,Ican’tstandit.Thereweretoomanypeopleandtheweatherwastoohot.
如图，在Rt△ABC中，∠ACB=90°.
(1)用尺规在边BC上求作一点P，使PA=PB(不写作法，保留作图痕迹);
(2)连结AP，若AC=4，BC=8时，试求BP的长.
