大量不保留灌肠时液面与肛门之间的距离一般为( )
A.20~30cm B.20~40cm C.30~40cm D.40~50cm E.40~60cm
参考答案:E
---Excuse me, would you please tell me ________?
---Certainly. Go straight along here. It's next to a hospital. [ ]
A. how we can get to the post office
B. how can we get to the post office
C. how get to the post office
D. how could we get to the post office
请列出在进行Channel Verification时可以设定的自动判定准则中的两项