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ex1 1.for 2.since 3.recently 4.today 5.before 6.since 7.last night 8.for ages 9.since 10.how long ex2 2.since I last went to 3.she has become 4.did Helen and Robert get 5.been wearing those trousers for 6.haven't spoken to each other for a 7.already had something to

1. Hoa said the rivers in her home village are very big, deep, wide and long . 2. He told his uncle that the restaurants around there were cheap and popular to customers . 3. Mary said that she didn't have his telephone numbers because she hadn't copy it in her address book . 4. Lan said that...

mình làm có gì đó sai sai

R13=R1*R3/R1+R3=2*6/2+6=1.5 R24=R2*R4/R2+R4=4*12/4+12=3 Rtd=R13+R24+R5=1.5+3+1.5=6 Imc=I13=I24=I5=UAB/Rtd=12/6=2 U13=U1=U3=R13*I13=1.5*2=3 U24=U2=U4=R24*I24=2*3=6 U5=I5*R5=2*1.5=3 I1=U1/R1=3/2=1.5 I2=U2/R2=6/4=1.5 I3=U3/R3=3/6=0.5 I4=U4/R4=6/12=0.5 IA=I1-I2=1.5-1.5=0