【简答题】D Mr. Smith works in an office.He is very busy and has no time to have a good rest.Every evening, when he comes from his office, he's always tired and wants to go to bed early.But his wife often has a...
【判断题】π线和σ线在平行于磁场方向传播时,看不到π线。
【单选题】关于间接免疫凝集抑制说法正确的是
A.
已知抗原致敏颗粒载体和相应抗体,可测标本中是否存在和致敏抗原相同的抗原
B.
反向间接免疫凝集抑制试验用于检测标本中的抗原
C.
正向间接免疫凝集抑制试验用于检测标本中的抗体
D.
出现凝集现象,说明标本中存在与抗原致敏颗粒相同的抗原
E.
无凝集现象,说明标本中不存在与抗原致敏颗粒相同的抗原
【判断题】π线和σ线在平行于磁场方向传播时,看不到π线。
【单选题】读者通过自助借还机办理还书手续之后 , 应将图书归还至 ( ) 。
【单选题】读者通过自助借还机办理还书手续之后,应将图书归还至?
【简答题】用所给单词的适当形式填空。 1. _____ (be) your mother in Beijing last week? 2. He often _____ (play) basketball after school when he was a studerit. 3. —What ______you_____ (do) last night? —I _____ (watch) TV ...
【单选题】下列哪一个不是决定竖曲线的最小半径的因素()
【简答题】Richard found work in a big office after he had finished college. He liked to use his head and was good 46 his work. So he was often paid more than his workmates and he worked faster. But something wa...
【多选题】下列关于缓和曲线的说法正确的是( )
C.
《标准》规定,除四级公路可不设缓和曲线外,其他各级公路,当圆曲线半径小于不设超高的最小半径时,均应设缓和曲线
D.
设置在直线与圆曲线之间或大圆与小圆之间的过渡线形