Dùng cần cẩu để nâng thùng hàng có khối lượng 2500kg lên cao 12m. Công thực hiện trong trường hợp này là bao nhiêu ? A: 300kJ B: 350kJ C: 450kJ D: 400kJ

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PHẦN 3: TIẾNG ANH IV. Put the words in order to make sentences. 1. are / Sports Day / going / classmates / play / chess / to / My / on / . …………………………………………………………………………………… 2. you / are / to / going / Teachers’ / on / Day / What / do / ? …………………………………………………………………………………… 3. will / Day / be / When / Children’s / ? …………………………………………………………………………………… 4. are / practising / We / hard / festival / the / to / sports / . …………………………………………………………………………………… 5. second / The / be / on / singing / will / September / contest / of / the / . …………………………………………………………………………………… 6. you / matter / What’s / with / the / ? …………………………………………………………………………………… 7. has / backache / My / grandfather / a / . …………………………………………………………………………………… 8. You / doctor / should / to / the / go / take / rest / and / a / . …………………………………………………………………………………… 9. carry / heavy / He / shouldn’t / things /. …………………………………………………………………………………… 10. the / your / What’s / with / matter / sister / ? ……………………………………………………………………………………