1847年在英国首先将氯仿用于外科手术者是()
A.Snow
B.Leilig
C.sinposon
D.Jiuporob
E.Morton
参考答案:C
How many _________ can you find?[ ]
A. wordes
B. worded
C. words
D. wordings
从大肠杆菌或小牛肠黏膜提取的是().
A.HRP
B.OPD
C.TMB
D.AP
E.β-Gal