Cho tia Ax, kẻ tia AB vuông góc với Ax. Lấy điểm C nằm trong góc BAx. Kẻ CD vuông góc Ax (D ∈ Ax). Nối D với B và nối C với A. BD cắt CA tại E. Kẻ EF vuông góc với Ax (F ∈ Ax) Chứng minh: $\widehat{CFE}=\widehat{BFE}$. Xin cảm ơn

Mong các bạn giúp mình nhanh nhất có thể Lưu ý -làm ơn đừng trả lời linh tinh vì tui sắp phá sản điểm rùi

Lúc 7 giờ, một ô tô chở hàng đi từ A với vận tốc 45km. Sau 2 giờ, một ô tô du lịch cũng đi từ A với vận tốc 60 km/giờ và đi cùng chiều với ô tô chở hàng. Hỏi kể từ lúc bắt đầu đi, sau mấy giờ thì ô tô du lịch đuổi kịp ô tô chở hàng?

tính điện năng tiêu của 3 bóng đèn 220V-40W trong 1 tháng (30 ngày ) mỗi ngày đèn bật 8 giờ

I. Fill in the blanks with WHO, WHICH or THAT: 1. The men _______ lives next-door are English. 2. The dictionary _______ you gave me is very good. 3. Do you know the girls _______ are standing outside the church? 4. The police are looking for the thieve _______ got into my house last night. 5. The chocolate _______ you like comes from the United States. 6. I have lost the necklace _______ my mother gave me on my birthday. 7. A burglar is someone _______ breaks into a house and steals things. 8. Buses _______ go to the airport run every half hour. 9. I can't find the key _______ opens this door. 10. I gave you a book _______ had many pictures. 11. I don't like the boy _______ Sue is going out with. 12. Did you see the beautiful dress _______ she wore yesterday. 13. The man _______ she is going to marry is very rich. 14. This is the bank _______ was robbed yesterday. 15. He wore a mask _______ made him look like Mickey Mouse. II. Fill in the blanks with WHO, WHICH or WHOSE: 1. He arrived with a friend ______ waited outside in the car. 2. The man ______ mobile was ringing did not know what to do. 3. The car ______ the robbers escaped in was a BMW. 4. The woman ______ daughter was crying tried to calm her down. 5. The postman ______ works in the village is very old. 6. The family ______ car was stolen last week is the Smiths. 7. The cowboy ______ is wearing a red shirt looks very funny. 8. A bus is a big car ______ carries lots of people. 9. The volunteers, ______ enthusiasm was obvious, finished the work quickly. 10. Children ______ like music are often good at mathematics. 11. The engineers ______ designed the building received an award. 12. The girl ______ recited the poem is my niece. 13. The townspeople, ______ pride in their community is well- known, raised enough money to build a new town hall. 14. The Pacific Ocean, ______ might have been crossed by raft during the Stone Age, is the world's largest ocean. 15. The newspaper to ______ we subscribe is delivered regularly.

Em hãy viết một đoạn đưa ra ý kiến của mình: "Theo em, Dương Tam Kha là tội nhân của nước ta hay là người vì dân vì nước? Nhanh nha, ngắn gọn AUTO CTLHN+5 SAO

sắp xếp câu cho đúng 1.to/you/do/want/why/to/park/go/the

It is not enough simply to read a book on how to.......Tại sao trong câu này simply là tr từ lại đứng sau enough ạ

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ý nghĩa nhan đề văn bản tay trong tay là gì