---- How about your journey to Mount Emei?

---- Everything was wonderful except that our car ___ twice on the way.

A．slowed down

B．broke down

C．got down

D．put down

2个月婴儿，腹泻3天，大便每天 10多次，呈蛋花汤样，伴呕吐，尿少，精神萎靡，拒奶，面色苍白，前囟、眼窝凹陷，口唇樱红皮肤弹性差。除诊断婴儿腹泻、中度脱水外，还应考虑

A．低血容量休克

B．代谢性碱中毒

C．低镁血症

D．代谢性酸中毒

E．低钙血症