显示食管腔内肿瘤首选的检查方法是()。
A.CT扫描
B.食道钡餐造影
C.MRI检查
D.体表超声检查
E.内腔镜超声
参考答案:B
___________achievements,last weeks ministerial meeting of the WTO here earned a low,though
not failing grade. [ ]
A. In terms of
B. In case of
C. In face of
D. In need of
压缩机C4201AB四通阀阀柄只能进行()的旋转,有()种连通方式。