Asubscribermakesatwo-minutecallandafour-minutecallduringthebusyhour.Howmuchtrafficdoeshegenerateforthathour?()
A. 33millierlangs
B. 66millierlangs
C. 100millierlangs
D. 10millierlangs
E. 25millierlangs
当人员落水,驶近落水者的操船方法,最适用立即行动的操船方法是()。 ①singleturn ②doubleturn ③Williamsonturn ④Scharnowturn
A. ①②③④
B. ①②③
C. ①②
D. ③④
Whichofthefollowingisnotnecessarytoconsiderwhensurveyingapotentialsite?()
A. Spaceforantennas
B. Frequencyallocation
C. Electricalpoweravailability
D. Permission/Contractwithowner
E. AvailabilityofPCMlinktotheBSC
某一矩形截面两端受到拉力F的作用,设杆件横截面面积为A,经分析可知,与轴线成α角的截面m-n上的()。
A. (A)
B. (B)
C. (C)
D. (D)