统计最基本的职能是监督职能。()
参考答案:错
黑便()呕血()心悸乏力等周身表现()
A.成人每日消化道出血量>5~10ml
B.成人每日消化道出血量50~100ml
C.胃内储积血量在250~300ml
D.一次出血量<400ml
E.出血量>400~500ml
My aunt is _____________ getting fat, so she seldom has supper.
A.worry about
B.careful with
C.full of
D.afraid of