Giúp minh với nhanh lên nha mai mình nộp rồi (3x)² ÷ 3² = 1/(24³)

Hông pé ơi

II. Vocabulary - Grammar - Language Functions UNIT 7 1. Which ____________ of transport do you prefer, train or plane? A. means B. signal C. public 2. There used to ____________ a lot of trees on the streets. A. have B. be C. are 3. Lien _____ to get up early in the morning but now she does. A. used B. didn’t used C. didn’t use 4. You shouldn’t ride a motorbike without wearing a ___________. A. helmet B. seatbelt C. handle bar 5. There ____________ be many traffic accidents. A. used to not B. didn’t used to C. used to 6. In this country, it is illegal to drive a car without a __________. A. means of transport B. driving license C. speed limit 7. Jane: Are your parents coming this weekend? Billy: “Yes. _______________.” A. I have no idea B. I can’t wait to see them C. Great idea 8. Suzy used to _______ swimming every weekend when she was in college. A. go B. went C. goes 9. ________ is just one kilometer from here to the nearest beach. A. This B. There C. It 10. Tony ___________ cycle but now he does it regularly. A. used not to B. used to C. didn’t use to UNIT 8 1. ____________ having performed excellently in many films, he has never won an Oscar for Best Actor. A. In spite of B. Despite of C. Although 2. It was a _________. However, we didn’t find it funny at all. A. horror B. comedy C. documentary 3. Tom and Jerry is a(n) __________. A. thriller B. animation C. romantic comedy 4. The beginning of the film was __________. Everyone was ________. A. confusing - confused B. confused - confusing C. confuses - confused 5. The film was interesting. __________, Jane slept from beginning to end. A. Although B. Nevertheless C. Despite 6. _________ not spending much money on the film, they made it successful. A. Even though B. Although C. In spite of 7. Their love story was so _________. I was close to tears after hearing it. A. touched B. touches C. touching

Chủ ngữ: "Con sơn ca"

Vị ngữ: Phần còn lại

TL:

1) Xét tam giác ABM và tam giác CDM có:

- AM = CM

- Góc AMB = góc CMD (2 góc đối đỉnh)

- BM = DM

-> Tam giác ABM = tam giác CDM (c.g.c)

2) Vì tam giác ABM = tam giác CDM 

-> Góc MAB = góc MCD = 90^o

-> MC vuông góc vs CD hay AC vuông góc vs DC 

3) Vì E là trung điểm của BC , M là trung điểm của AC -> EM là đường trung trực của tam giác ABC -> EM//AB mà AB//DC (cùng vuông góc với AC) nên EM//DC hay MF//DC, ta có:

- M là trung điểm của AC (giả thiết)

- MF//DC (cmt)

Nên MF là đường trung trực của tam giác ACD

-> F là trung điểm của AD