user-avatar
Hoangyen447
2 năm trước
Cho tứ diện S.ABCD có đáy ABCD là hình bình hành. Gọi H,K lần lượt là trung điểm SB,SD a)Tìm giao điểm E của HK với (SAC), giao điểm I của SC với (AHK) b) HI cắt BC tại M, KI cắt CD tại N.Chứng minh A,M,N thẳng hàng
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

I. Choose the correct word A, B or C for each gap to complete the following passage. (1) January 17th, 1995, a powerful earthquake hit the city of Kobe, Japan. Many buildings (2) or collapsed. Soon after the earthquake, people in Kobe (3) working together to save their city. Neighbours pulled each other out (4) collapsed buildings. Ordinary people (5) out fires even before the fire trucks arrived. Volunteers in Kobe organized themselves into (6) . They worked out a system to send (7) to people who needed. Other teams searched for belongings in damaged stores and homes. Some people (8) food, water, clothes, and electric generators to different part of the city. Some volunteers took (9) of children who had lost their parents. Teams of volunteers from outside Japan helped, too. Today, Kobe has been built. But people there still remember the outpouring of support they (10)_______ from all over the world back in 1995. 1. A. in B. at C. on D. from 2. A. is burning B. burned C. burning D. burn 3. A. to begin B. are beginning C. begin D. began 4. A. into B. of C. on D. with 5. A. to put B. putting C. puts D. put 6. A. teams B. pair C. group D. friends 7. A. helped B. helping C. help D. to help 8. A. brought B. bringing C. brings D. brought 9. A. part B. care C. caring D. note 10. A. received B. is receiving C. have received D. receiving MONG MN LM DÙM VS AH MK SẼ ĐG 5 ***** VS CTLHN

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team