牛， 4 岁， 眼部角膜表面有白色斑点，稍突出表面，逐渐变大形成疣状物;眼睑见乳头状瘤样肿块，表面破溃出血。该牛眼睑瘤样物很可能是
B
暂无解析
临床试验和临床研究的正确方法是：
ThethreePuritantraditionsare________.
Inordertobuyanewcar,youshouldatleast______onehundreddollarsaweek.
When_______,waterwillbeturnedintosteam.
________，hehadnotimetorest.
Thedriverpulled_____atthetrafficlights.
Withsuchapoorscoreintheentranceexam，it’s________impossibleforhimtobeadmittedtothisuniversity.
WhatisIrelandcalledinIrish?
Hewouldhavegivenyoumorehelp,ifhe________sobusy.
Itisnousearguing_______theplanbecauseithasbeenrejected.
Homingpigeonisusefulasa______carrierbecausewhentakenfromhome,itwillreturnatthefirstopportunity.