A.開放性神經(jīng)管缺損B.先天性心臟病C.先天性水俁病D.白內(nèi)障
A.B型超聲B.胎兒鏡檢查C.胎兒超聲心動圖D.羊膜腔造影術(shù)
A.30cmB.40cmC.50cmD.60cm