.--- Haven't I told you that I like the beef well done?

---Yes, but I _____ it longer than I usually do.

A．was cooking

B．will cook

C．cooked

D．had cooked

胸膜腔的最低部分是（）

A.膈胸膜

B.肋胸膜

C.纵隔胸膜

D.胸膜顶

E.肋膈隐窝