患者,女性,68岁,脓血便4周。首选的检查方法是
A.口服吞钡X线造影B.乙状结肠镜C.直肠指检D.磁共振成像E.直肠镜检查
参考答案:C
在钝角三角形中,两个锐角的和小于第三个角.______.
_______ is the distance from the mount to the river?[ ]
A. How far
B. How soon
C. How often
D. How long