能较好地反映胆囊浓缩功能的造影方法是
B
口服法胆系造影属生理排泄法造影,口服对比剂后12 至 14 小时,可较好显示胆囊浓缩功能,而其余静脉法或直接引入法造影,因对比剂浓度大,造影时间短,而不能较好显示胆囊浓缩功能。
AsfarasAustraliancultureisconcerned,thehistoryofAustraliacanbedividedintothefollowingphaseswiththeexceptionof________.
In1900,theenergyderivedfromburningpetroleumwasonlyfourpercent______ofcoal.