The earthquake and the heavy losses ________contributed to disabled this family to afford his education.

A．that

B．it

C．what

D．which

瘢痕性幽门梗阻的典型症状是（）

A.恶心、嗳气、食欲减退

B.经常呕吐

C.上腹部疼痛

D.代谢性酸中毒体征

E.上腹部闷胀感