通常按会计核算软件的职能来划分功能模块，并以账务处理为中心来划分结构，一般来说，账务分析子系

A．35km

B．70km

C．50km

A．6

B．7

C．10

D．19

Iron(ρ＝7．86 g.cm-3)crystallizes in a BCC unit cell at room temperature．Calculate the radius of an iron atom in this crystal．At temperatures above 910℃ iron prefers to be FCC．If we neglect the temperature dependence of the radius of the iron atom on the grounds that it is negligible，we can calculate the density of FCC iron．Use this to determine whether iron expands or contracts when it undergoes transformation from the BCC to the FCC structure．

ell with the downlink coverage radius 8km and the uplink coverage radius 5km. Which of the following measures can be used in order to keep the uplink and downlink balanced？ ()

A.Increase the transmitter power of BTS

B.Decrease the transmitter power of BTS

C.Use a tower amplifier for BTS

D.Use an antenna with a low gain

A．A.Increase the transmitter power of BTS

B．B.Use a tower amplifier for BTS

C．C.Use more carrier frequencies for this cell

D．D.Increase the height of the antenna

E．E.Use an antenna with a low gain

A.one size larger than the pump discharge nozzle

B.the same size as the pump discharge nozzle

C.one size smaller than the pump discharge nozzle

D.installed with a short radius elbow at the pump

The output voltage, VO, is given by ______.

A、VO =

B、VO =

C、VO =

D、None of the above

A.(▲Vo/Vo)/▲Vi

B.Vo/▲Vo)/▲Vi

C.(▲Vo/Vo)/Vi

D.(Vo/▲Vo)/Vi

A．100 dBm

B．50 dBm

C．30 dBm

D．20 dBm