角膜移植排斥反应的最主要机制是( )
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.Ⅴ型超敏反应
参考答案:D
以葡萄糖为例简述细菌能量代谢过程中发酵途径的作用。
—Did you scold him for failing in the maths test?
—Yes, but I'd rather I _______. [ ]
A. wouldn't
B. didn't
C. shouldn't
D. hadn't