早期检测患者血清中有无伤寒、副伤寒杆菌抗体的方法是A.酶联免疫吸附试验 B.肥达试验 发布时间:2017-06-24 08:51 │ 来源:www.tikuol.com 题型:单项选择题 问题: 早期检测患者血清中有无伤寒、副伤寒杆菌抗体的方法是A.酶联免疫吸附试验B.肥达试验C.外斐试验D.胶乳凝集试验E.冷凝集试验
题型:单项选择题 已知曲线y=13x3+12x2+4x-7在点Q处的切线的倾斜角α满足sin2α=1617,则此切线的方程为( )A.4x-y+7=0或4x-y-656=0B.4x-y-656=0C.4x-y-7=0或4x-y-656=0D.4x-y-7=0 查看答案
题型:单项选择题 He spent every minute he could spare on books _____ an entrance prize to a college.A. to win B. won C. winning D. and win 查看答案