直径为20mm的水泥管道在1000m长度，-昼夜内允许渗水量为 ___
A．7m3
B．20m3
C．30m3
D．34m3
参考答案：B
You did not perform as well as the other competitors—________，you failed.
A．in other words
B．after all
C．in the end
D．at the same time
澳门特别行政区区旗的底色是什么颜色？
