脱脂时脱脂刷以圆状刷洗之目的为（）
A.使网孔内侧亦能洗清
B.速度较快
C.压力较大
D.无意义
参考答案：A
Which sentence is wrong?
A．Time and tide waits for no man.
B．Many a student are busy with their lessons.
C．As is known to all, Rocky mountains stand in North America.
D．The singer and dancer is to attend our party.
患者女，50岁。黄疸，B超显示：肝内胆管直径约1cm。应进一步选择的检查是（）。
A.静脉胆道造影
B.核素扫描
C.经皮肝穿刺胆道造影
D.十二指肠低张造影
E.腹腔动脉造影
