膜式燃气表在0.2qmax时二次示值误差分别为1.4%和1.2%,则该流量点示值误差是()。
A、1.4%
B、2.6%
C、1.3%
D、1.2%
参考答案:C
---I’m going to San Francisco for a couple of days
---_________.I wish I could get away for a while.
A.It doesn’t matter.
B.Forget it.
C.I really envy you.
D.I can’t agree more.
管子与管件在使用前的外观检查,其表面的质量要求有哪些