协议规定，LTE的小区物理ID的取值范围（）。
参考答案：0～503
—You have made great progress recently.
—______. [ ]
A. So has Ann
B. So Ann has
C. So she does
D. So does she
调压阀组中（）可手、自动切换。
A、￠300mm
B、￠600mm
C、￠500mm
