试样容器装好且油料封闭以后,应立即检查是否有()
A.游离水
B.渗漏
C.乳化层
D.杂质(污染)
参考答案:B
You would not have made so silly mistakes , but it is a pity you _______ my advice.
A.didn’t accept
B.hadn’t accepted
C.hasn’t accepted
D.wouldn’t have accepted
结核菌素试验的原理是
A.Ⅰ型超敏反应B.Ⅱ型超敏反应C.Ⅲ型超敏反应D.Ⅳ型超敏反应E.毒素和抗毒素的中和反应