在图1-12中，已知E1=6V、E2=9V、E3=3V、R1=2Ω、R2=3Ω、R3=7Ω、R4=4Ω、R5=6Ω，求电压UAB的值（）

VE Under the ve chartering ，the shipowner is responsible for the fixed running expenses aswell as for the ve expenses .（） I ________the day before yesterday, I’ve _________for 2days. 33Although I’ve never worked for a bank before, I feel quite ______ there because I’m used to dealing with figures 将局部E-R图合并为全局E-R图时，可能会产生一些冲突。 下列冲突中不属于合并E-R图冲突的是 如图1-2-12所示电路中，已知电流为（　　）。图1-2-12 发动机型号12VE230Z，它表示什么？ 发动机型号12VE230Z，它表示什么 I am pleased with what you’ve given me and __________ you’ve done for me. ‘ve left the classroom key insideagain—NoI’ve got it with me this time,but Ihave forgotten ______ the door 已知R1：IF E1 THEN (200，1)H 。R2：IF E2 THEN (30，1)H 。证据E1和E2必然发生，并且P(H)=0.03，则P(H/E1E2)=()。 已知R1：IF E1 THEN (200，1)H 。R2：IF E2 THEN (30，1)H 。证据E1和E2必然发生，并且P(H)=0.03，则O(H/E2)=()。 请指出本案例图2-29-1、图2-29-2中的问题？ 什么是E-R图?构成E-R图的基本要素是什么? 什么是E-R图？构成E-R图的基本要素是什么？ I’ve talked to him on the telephone but I’ve never actually met him face to face. ve left the classroom key insideagain—No.I’ve got it with me this time,but Ihave forgotten ______ the door __________at the new school?—Fine , I’ve got used to the life there and I’ve made some friends. We’ve published large quantities of books This year______ we’ve published three million copies The first underground library in Beijing last year.— I’ve heard that the e-books on the train by the National Library.