Not only ______ prepare lunch for us, but also _______ clothes for us.

A．he did , he washed

B．he did , did he wash

C．did he , he washed

D．did he, did he wash

使胰脂肪酶作用大为增加的物质是

A．进入小肠的胃酸

B．碳酸氢盐

C．胆盐

D．胆固醇

E．胃肠道激素