—Wright, I really appreciate your neat handwriting．

—         ．

A．Oh, I practice every day

B．Well, it's not good enough

C．No, I don't write well

D．Oh, thank you very much

把真菌与细菌相比，最重要的区别是（　　）

A．细菌的细胞小

B．细菌细胞形状有多种

C．细菌的细胞中没有成形的细胞核

D．细菌的细胞中缺少DNA