下述哪种患者不易出现血栓形成()
A．大面积烧伤
B．直肠癌根治术后
C．晚期胃癌患者
D．心房纤颤
E．皮肤荨麻疹
参考答案：E
The trip from Tianjin to Beijing _____ about two hours by coach. [ ]
A. spends
B. costs
C. takes
D. pays
圆桶圆锥形重介旋流器入料口直径约为（）D。
A.0.1～0.2
B.0.2～0.3
C.0.3～0.4
D.0.4～0.5
