树脂灰分的测定是指试样灼烧后（）残渣
A、有机
B、无机
C、有机和无机
参考答案：B
—What he did made me _____ unhappy.
—Oh, really? What did he do? [ ]
A. feel
B. feels
C. to feel
D. feeling
创立病原菌判定原则的是
A．李斯特B．郭霍C．巴斯德D．弗莱明E．伊凡诺夫斯基
