免疫渗滤试验衍生于()
A.免疫扩散试验
B.免疫层析试验
C.免疫印迹试验
D.dot-ELISA
E.RIA
参考答案:D
—When did you meet her last?
—I don’t remember exactly, but I’m sure it was ______Friday when I went to the shop to buy _______football.
A.a;a
B.不填;a
C.the;不填
D.不填;不填
油膜轴承安装前的准备工作有哪些?