烹饪中运用较多的干肉皮是______。
A．牛皮
B．羊皮
C．驴皮
D．猪皮
参考答案：D
What a kind teacher. But for his help, I __________ my study.
A．wouldn’t finish
B．wouldn’t have finished
C．shouldn’t have finished
D．mustn’t have finished
关于生物学检测法哪项不正确（）。
A.刺激细胞增殖
B.维持细胞生长
C.保持细胞活性
D.抑制细胞生长
E.以上均不对
