图章石的质量评价依据是:(),(),(),().
参考答案:颜色、质地、透明度、块度
同义句转换
There is a mobile medical team made up of ten doctors in our town.
There is a mobile medical team____ ____ ten doctors in our town.
肝癌组织发生坏死时,超声可见的特点是()
A.肿块中出现边界整齐的液暗区
B.肿块中出现边界不规则的液暗区
C.肿块中出现高回声团
D.肿块的后方有衰减效应
E.肿块的后方有增强效应