Regulations require__________needs special diets         the cooking manager in advance.

A．who; informs

B．whom; informed

C．whomever; inform

D．whoever; inform

属于交界恶性肿瘤的是（）

A.子宫颈平滑肌瘤

B.食管腺癌

C.肝血管肉瘤

D.顽固性贫血

E.类肉瘤