下颌第一磨牙的特点是()。 A.面长方形,有五条发育沟 B.舌面外形高点在1/3处 发布时间:2017-05-12 22:08 │ 来源:www.tikuol.com 题型:单项选择题 A1型题 问题: 下颌第一磨牙的特点是()。A.面长方形,有五条发育沟B.舌面外形高点在1/3处C.邻面外形高点在颈1/3处D.颊面似长方形,有两个牙尖E.有两颊一舌3个牙根
题型:单项选择题 A1型题 铊(Tl)盐与氰化钾(KCN)被列为A级危险品。已知下列反应在一定条件下能够发生:(1)Tl3++2Ag=Tl++2Ag+(2)Ag++Fe2+=Ag+Fe3+(3)Fe+2Fe3+=3Fe2+,下列离子氧化性比较顺序正确的是A.Tl3+>Fe3+>Ag+B.Fe3+>Ag+>Tl3+C.Tl+>Ag+>Fe2+D.Tl3+>Ag+>Fe2+ 查看答案
题型:单项选择题 A1型题 Little ______ that we were watching his every move,so he seemed to be going his own way in this business.A.did he knowB.he didn't knowC.didn't he knowD.he knew 查看答案