根据B超检查估计腹腔积液的量,每lcm液平段,腹腔积液量约为()
A.50ml
B.200ml
C.300ml
D.500ml
E.800ml
参考答案:D
You buy a gift, but you can if you want to.
A.must
B.mustn't
C.have to
D.don't have to
数据的逻辑结构被分为______、线性结构、树形结构和图形结构四种。