税务登记要求在领到营业执照后（）天内办理。
A、20
B、30
C、40
D、10
参考答案：B
To get to the top of the mountain, we had to _______.
A．go some walking
B．do a lot of climbing
C．walking a long way
D．doing a lot of climbing
在全面质量管理中，什么叫PDCA循环法？
