Give me a not long account of what happened.CLOSEST

In Africa, many children die from not having enough food.CLOSEST

A.    poverty                B.   starvation             C.   drought                D. malnutrition

The dog is not well. We have to take it to see the person who treats sick animals.CLOSEST

There is no thing to make it likely or certain that he will be at the party.CLOSEST

Fruit is customarily treated with sulfur prior to drying to reduce any color change.CLOSEST

Married couples can get a divorce if they find they are not compatible.CLOSEST

A.   able to share an apartment or house        B. able to budget their money

The newscaster gave a concise account of the strategy.CLOSEST

A.  complicated and intricate             B. short and clear

C.   sad and depressing                      D. long and detailed

She was brought up in a well-off family. She can’t understand the problems we are facing.OPPOSITE

As an executive director of a big company, she is a woman of extraordinary intelligence.OPPOSITE

As an executive director of a big company, she is a woman of extraordinary intelligence.OPPOSITE

A.    moderate             B.   remarkable            C.    little         D. sufficient

Synthetic products are made from chemicals or artificial substances.OPPOSITE

A.   natural                  B.  made by machine             C.   man-made            D. unusual

Affluent families find it easier to support their children financially.OPPOSITE

The consequences of the typhoon were disastrous due to the lack of precautionary measures.OPPOSITE

Such problems as haste and inexperience are a universal feature of youth.CLOSEST

A.   marked     B.   shared       C.   hidden      D. separated

His new work has enjoyed a very good review from critics and readers.CLOSEST

We have lived there for years and grown fond of the surroundings. That is why we do not want to leave.CLOSEST

A.    planted many trees in the surroundings

B.    haunted by the surroundings

C.    loved the surroundings

D.    possessed by the surroundings

There is growing concern about the way man has destroyed the environment.OPPOSITE

He didn’t seem in the least concerned for her safety.OPPOSITE

We are very grateful to Professor Humble for his generosity in donating this wonderful painting to the museum.OPPOSITE

A.   meanness              B.   sympathy              C.   gratitude               D. churlishness

She wrote me a vicious letter.OPPOSITE

A.   helpful      B.   gently       C.   dangerous             D.  healthy

My first impression of her was her impassive faceOPPOSITE

A.   emotional             B.    respectful            C.   solid         D. fractious

It was too late to stop the panic that had resulted from the false news report.CLOSEST

Don’t you ever mention that matter again. I will not hear anything of it.CLOSEST

In astronomy, a scale of magnitude from one to six denotes the brightness of astar.CLOSEST

Laws on military service since 1960 still hold good.CLOSEST

A.  is  in good condition         B. remains for good

C.  stands in life                     D. remains in effect

The doctor was sued for bad treatment.CLOSEST

Slavery was abolished in the US in the 19th century.OPPOSITE

A.    instituted             B.   eradicated            C.   eliminated            D. required

Slavery was abolished in the US in the 19th century.OPPOSITE

A.    instituted             B.   eradicated            C.   eliminated            D. required

Doctors have been criticized for their indiscriminate use of antibiotics.OPPOSITE

A.   disciplined           B.   selective               C.   wholesale             D. unconscious

Oxi hóa hoàn toàn 4.8g Magie. Hỏi:

a.Khối lượng Magie sau PƯ tăng hay giảm bao nhiêu g?

b. Lượng sản phẩm thu được cho tác dụng bao nhiêu g H2SO4

Cho đường thẳng ($d_1$): y=-3x+4 và đường thẳng ($d_2$): y=x-4

Xác định hệ số a và b của đường thẳng ($d_3$): y=ax+b (a$\ne$0) biết ($d_3$) song song với ($d_1$) và ($d_3$) cắt ($d_2$) tại điểm B có hoành độ bằng 3

Cho nữa đường tròn tâm (O) đường kính BC.Vẽ hai tiếp tuyến Bx và Cy của (O).Gọi A là điểm trên nửa đường tròn sao cho AB$<$AC.Tiếp tuyến tại A của (O) cắt Bx và Cy tại M và N.Vẽ đường cao AH của $∆$ABC.Đường thẳng AC cắt Bx tại D.C/m OD$\perp$BN

Cho đơn thức A=5m${\left({\mathrm{x}}^2{\mathrm{y}}^3\right)}^3$;B=$\frac{-2}{\mathrm{m}}$${\mathrm{x}}^6{\mathrm{y}}^6$(m là hằng số dương)

a)Hai đơn thức A và B có đồng dạng không? Vì sao?

Viết phương trình minh họa cho các trường hợp sau:

a) 1 đơn chất tác dụng với dung dịch chứa 1 axit tạo ra 3 oxit

Số nghiệm pt sin(x-π/3)=1/2 trong khoảng (-3π;7π/2)