cho 2 dây dẫn dài 120m , cùng làm bằng nhôm , dây 1 có s1 =2 cm², s2=400mm²,r2=20 Ω. tinh R1

cho 2 dây dãn cung s bằng đồng 1 dây dài 3m dây 2 dài 30 dm , r1 40 ôm tính r2

     II. Supply the correct form of the words in parentheses to complete the sentences. (1pt)

1. _____________, women wear the ao dai on special occasions.                     ( tradition )

2. You can improve your speaking skill by talking to native English __________ ( speak )

3. The newspaper is published every day. It’s a  _____________  newspaper.   ( day )

4. Do you agree that nothing is more precious than _____________ ?               ( free)

5. This magazine is ____________ read by both teenagers and adults.              ( wide )

6. My sister has just bought a ____________ dress.                                           ( fashion )

7. I saw your center’s ___________ in today’s edition of the Viet Nam News. ( advertise)

8. One way of practicing speaking English is talking to ___________ English speakers.

III. Supply the correct tense of the verbs in parentheses to complete the sentences.

1. I _____________ to live here three months ago.                  ( move )

2. They_____________ from their old form teacher for ages. ( not hear)

3. Look ! That man ____________  to open the door of your car. ( try )

4. My brothers____________ stamps for nearly four years.          ( collect )

5. I used to……………………….in this river.                               (swim)

6. We  …………………….. a good time together last Christmas. (have)

7. We were watching TV when  the light …………………. out.   (go)

II. Combine sentences to make complex sentences ỏ rewrtite using given words

6. My family can eran enough money from selling the souvenirs.(on)

7. I am trying to study hrad so that I can say equal  with her.( up)

8.  We have to arrive at the airport at 5.(up)

9.  He will read the advertisement to know when it happens.(through)

10.They will publish a book about a famous person.(out)