I、单选题：WhichisnottrueforRAIU?()ANolevothyroxinetherapywithinweeks.BNobreakfastonthefistdayofthestuys.CNoneedtobaniodinediet.DNoantithyroiddrugsfortoweek. 点我阅读全文
donotcontributetothefinalimage、单选题：Atechnologistcoversthecollimator(whichisfacingtheceiling)withabsorbentpaperandobtainsauniformityimageusingaliquidfloodsourcewithaddedmTc.Aroundcoldspotisseenontheimage.Subsequentlythetechnologistremovesthecollimator，turnsthecamerafacedownandobtainsanotherimageusingapointsourceplacedonthefloor.Thisimageappearsuniform.Whatisthemostlikelycauseofthecoldspotonthefirstimage?（）AdecoupledphotomultipliertubeBsubtlecrystalcrackCcollimatordefectDimproperenergypeaking 点我阅读全文