Rewrite the following sentences based on the given words.

1. In my family, all of children have to get up before 6 a.m and do exercise

=> ................................................................................................................. (obliged)

2. Students have to book in advance to use computer at the school library

=> .............................................................................................................(necessary)

3. In most of the temples and pagodas in Vietnam, you have to take off your shoes when going inside the main worship areas.

=> ............................................................................................................................................................................................ (allowed)

4. To visit Ho Chi Mnh Mausoleum, people must hand in their indenity cards.

=> ......................................................................................................(obliged)

5. In Vietnam, people must drive on the right of the road

=> ..................................................................................(can't)

Tưởng tượng cuộc đối thoại giữa Giôn- xi và Xiu sau khi Giôn- xi nghe xong câu chuyện về cụ Bơ- men. Trong đoạn hội thoại sử dụng trợ từ, thán từ, tình thái từ

Fill in each blank with one suitable word to complete the passage below.
In July 1994 Jupiter, the largest planet in our solar system, was struck (1) ……………… 21 pieces of a comet. When the fragment landed in the southern hemisphere of the giant planet, the explosions (2) ……………… watched by astronomers here on Earth. But what if our planet was hit by a comet? The year is 2094. it has (3) ……………… announced that a comet is heading towards the Earth. Most of it will miss our planet, but two fragments (4) ……………… probably hit the southern hemisphere. On 17 July, a fragment four kilometers (5) ……………… enters the Earth’s atmosphere (6) ……………… a massive explosion. About half of the fragment is destroyed and pieces are scattered through the atmosphere. But the core survives and hits the South Atlantic at 200 times the (7) ……………… of sound. The sea boils and a huge hole is made in the sea bed. An enormous tidal (8) ……………… is created and spreads outwards from the hole. The wall of water, a kilometer high, rushes towards southern Africa at 800 kilometers (9) ……………… hour. Cities on the African coast are totally destroyed and millions (10) ……………… people are drowned. The wave moves into the Idian Ocean and heads towards Asia.

Chứng minh rằng:

a, F(x)= x⁴⁰⁰ + x²⁰⁰ + 1 chia hết cho G(x)= x⁴ + x² + 1

b, F(x)= x¹⁹⁷⁰ + x¹⁹³⁰ + x¹⁸⁹⁰ chia hết cho G(x)= x²⁰ + x¹⁰ + 1

Chứng minh rằng: Phân thức B=\(\dfrac{\left(y^2+b\right).\left(1+b\right)+b^2y^2+1}{\left(y^2-b\right).\left(1-b\right)+b^2y^2+1}\) là hằng số

Rút gọn phân thức:

a, \(\dfrac{x^3+x^2-4x-4}{x^3+7x^2+6x^3-6x+1}\)

b, \(\dfrac{x^4+x^3-x-1}{x^4+x^3+2x^2+x+1}\)

c, \(\dfrac{x^4+6x^3+9x^2-1}{x^4+6x^3+7x^2-6x+1}\)

Rút gọn phân thức:

\(\dfrac{2x^2+xy-y^2}{2x^2+3xy+y^2}\)

a, ..... + Cl₂ ----> FeCl₃

b, Fe₃O₄ + H₂ ----> Fe + H₂O

c, Al + CuSO₄ ----> ....... + Al₂(SO₄)3

d, BaCl₂ + ........ ----> BaSO₄ + NaCl

1, Lập phương trình hóa học của phản ứng.

2, Cho biết tỉ lệ số nguyên tử, phân tử của phản ứng.

Cho biết a³ - 3ab²= 5 và b³ - 3a²b= 10. Tính S= 2018a² + 2018b²

Đặt câu với các trợ từ sau: chính, đích, đến, cả, lấy, ngay, thì, là

CÂU HỎI MANG TÍNH CHẤT HACK NÃO. CẢM ƠN NHỮNG BẠN CHỊU ĐỘNG NÃO ĐỂ LÀM :)