Cho hình chóp S.ABCD có đáy ABCD là hình chữ nhật với AC=2a,BC=a. Đỉnh S cách đều các điểm A,B,C. Tính khoảng cách d từ trung điểm M của SC đến mặt phẳng (SBD).

1. Choose the word that has the underlined part pronounced different from the others: A. cooked B. wanted C. danced D. matched 2. Last year, we participated in . . . . . funds for street children. A. raising B. making C. gathering D. taking . Rewrite the sentences so that it stays the same meaning 3. Is Tokyo the largest city in population? Tokyo is ........................................................?

Giới thực vật chia làm các ngành nào?

VI. Give the correct verb form and tenses • Are you getting used to (live)……………in your new house yet? • We are not used to (live)……. In a cold climate. We’re used to a warm one. • I used to (be)……… a gardener. I’m not used to (sit)………….in an office all day. • Since I retired from my job, I can’t get used to (have) ………….. nothing to do all day. 5. They often (have) ________ eggs for breakfast. 6. We usually (play) _________ badminton. 7. She sometimes (wake up) ___________ late. 8. He always (go) ________ to the cinema at weekends. 9. Mary (watch) _________ TV every night. 10. This time last year I (live)………….. in Brazil 11. What……………. you (do)…………. at 10 o’clock last night? 12. Tom (cook) ……………the dinner 13. Tom burnt his hand when he (cook) ……………the dinner. Burn one’s hand : phỏng tay 14.We(read)………….. a book when he arrived 15.What…………. he (do) ……………..when you came? 16.At 9.o’clock yesterday Lan (not watch)………… T.V 17.All the students in grade 9 (do) ……………………the test at this time last week.

bt:Thiết lập phương trình hóa học của các phản ứng hóa học sau: 1.AgNO3+K3PO4->Ag3PO4+KNO3 2.FeS+HCL->FeCL2+H2S 3.Pb(OH)2+HNO3->Pb(NO3)2+H20 4.Mg(OH)2+HCL->MgCL2+H20

Cho x^4-x^3+mx^2+2x+4=0 tìm m để pt có 4 no pb

Mn giúp mik với . Mik cảm mơn mn nhìu ạ Add in, at, on where necessary.(Thêm vào chô trống bằng IN, AT ,ON nếu cần thiet) 1. Kate doesn’t usually works……….the weekend, but she had to work…….last Sunday. 2. We are leaving……………..tomorrow morning, but we will be back………….three weeks’ time. 3. Did she send you a postcard……….your birthday? 4. ……….what time does the meeting start…………..Monday? 5. I can often get home from work……………about half an hour …………….Friday evening. 6. They went on holiday to Spain……..Easter and then again………….the summer. 7. The bridge was built ………………..the 16th century. 8. Did you enjoy driving ……………….night? 9. I’m taking my driving test………….4:30 …………..July 3rd. 10. He was born………….1900 and died……………..1972. 1. I was born _____ January 1st, 1965. 2. It often rains _____ October _____ Vietnam. 3. What are you going to do _____ 2020? 4. I don’t know but I am going to go to college _____ September this year. 5. Well, let’s go for a walk ______ the weekends. 6. I don’t know what he is doing ______ the moment. 7. What did he do ______ the ninth of April, 2000? 8. She often hears some strange noise _______ midnight. 9. Does it rain _____ Spring?

vẽ mầm / anime / chibi chúc thi tốt or cỏ 4 lá NL : Sắp thi r mn ạ 😪😪😪

The bus stopped.......the man got off ( or, and, so, but)

Cho a >=2, a+b>=3. Tìm min:a^2+b^2+1/a+1/(a+b)