“月黑风高夜，杀人放火天”黑夜总是犯罪分子作案的好时段，为了人身财产安全，深夜外出要格外小心，尽可能行走偏僻小路（）
参考答案：错
It might seem that speaking politely is more difficult than_____.[ ]
A. be direct
B. being direct
C. to be directly
水泵装置的总扬程
