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cachcach0404
2 năm trước
Cho hình chóp s ABCD có đáy là hình vuông SA vuông góc với mặt phẳng Đáy . Gọi H K lần lượt là trung điểm của AB và AD Chứng minh rằng AC vuông góc với mặt phẳng SHK và CK vuông góc với SD
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1. They _______ their music lesson at 7 pm last night. (practise) 2. Thu _______ after her little brother next Sunday. (look) 3. This book _______ by Kim Dong publisher. (just publish) 5. The kids _______ when the bell rang. (sleep) 6. She _______ a lot of fruit yesterday. (eat) 7. Kim _______ us some fairy tales tonight. (tell) 8. The house _______ by the horrible storm last week. (destroy) 9. Some people _______ coffee every day. (drink) 10. The students in grade 9 _______ their final test in May. (have) 11. The boys _______ across the river in a competition last Saturday. (swim) 12. They _______ to their teacher about the next trip. (talk) 13. Tam _______ a silver cup in a tournament two weeks ago. (award) 14. The girl _______ some clothes for their dolls now. (sew) 15. Women _______ to do all the housework long ago. (have) 16. Their parents _______ out for dinner last night. (go) 17. My grandparents _______ in HCM city for 10 years. (live) 18. Lan _______ some books from the library since Monday. (borrow) 19. They _______ Hanoi for HCM city yesterday. (leave) 20. Farmers often _______ their crops in August. (harvest) 21. Uyen _______ a bus to school every day. (take) 22. _______ you _______ (go) out last night? 23. _______ you _______ from George recently? (hear) 24. It's the first time he _______ a car. (drive) 25. Everything is going well. We _______ any problems so far. (not have) 26. I wish I _______ you someday. (visit)

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