运用B超探查动物肾区时,其肾盂部位声像图像为()
A.回声强而平滑
B.低强度均质微细回声
C.多个无回声暗区
D.放射状排列的强回声结构
E.点状回声区
参考答案:B
You can take_______ of the two toy cars and leave the other for your brother.
A.both
B.none
C.either
D.neither
气的运动,称之为
A.气机 B.气化 C.气滞 D.气交