在大区制中,为了提高服务区域的复盖半径,应该().
A.增加基站台发射功率和无线高度
B.增加基站数目
C.提高系统抗干扰触电
D.提高调制效率
参考答案:A
企业在确认商品销售收入后发生的销售折让,应在实际发生时计入“财务费用”。 ( )
One third of the students______ Young Pioneers, and the number of this_____ not change much in our class this term. [ ]
A. is, do
B. are, does
C. was, are
D. were, were