I will explain to them _______ we are planning to do on Sunday.

A．all what

B．all which

C．that

D．/

下列哪几项检查可以诊断急性胃黏膜损害（）

A.酶学检查

B.X线检查

C.根据临床表现

D.急诊胃镜检查

E.胃液分析