Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.

Environmental pollution is one of the impacts of human activities on the Earth. Pollution occurs when pollutants contaminate the natural surroundings; which brings about changes that affect our normal lifestyles adversely. Pollution disturbs our ecosystem and the balance in the environment. Pollution occurs in different forms; air, water, soil, radioactive, noise, heat/ thermal and light Let us discuss the causes and effects of air pollution on mankind and the environment as a whole.

Air pollution is the most prominent and dangerous form of pollution. It occurs due to many reasons. Excessive burning of fuel which is a necessity of our daily lives for cooking, driving and other industrial activities; releases a huge amount of chemical substances in the air every day; these pollute the air. Smoke from chimneys, factories, vehicles or burning of wood basically occurs due to coal burning; this releases sulphur dioxide into the air making it toxic.

The effects of air pollution are evident too. The increase in the amount of CO2 in the atmosphere leads to smog which can restrict sunlight from reaching the earth. Thus, preventing plants in the process of photosynthesis. Gases like sulfur dioxide (SO2) and nitrogen oxide (NO) can cause acid rain.

The decrease in quality of air leads to several respiratory problems including asthma or lung cancer. Chest pain, congestion, throat inflammation, cardiovascular disease, respiratory disease are some of diseases that can be caused by air pollution.

The emission of greenhouse gases particularly CO2 is leading to global warming. Every other day new industries are being set up, new vehicles come on roads and trees are cut to make way for new homes. All of them, in direct or indirect way lead to increase in CO2 in the environment. The increase in CO2 leads to melting of polar ice caps which increases the sea level and pose danger for the people living near coastal areas.

Ozone layer is the thin shield high up in the sky that stops ultra violet rays from reaching the earth. As a result of human activities, chemicals, such as chlorofluorocarbons (CFCs), were released into the atmosphere which contributed to the depletion of ozone layer.

(Source: https://goo.gl/RpdPw3)

According to paragraph 5, air pollution contributes to the greenhouse effect which can lead to 

A. global warming

B. polar ice melting

C. increase in CO2 in the environment

D. global warming, polar ice melting, rise of sea levels and danger for people.

Cho góc bẹt x O y ^ . Vẽ tia Oz sao cho y O z ^ =   60 °  .

a) Tính số đo góc z O x ^ ?

b) Vẽ tia Om, On lần lượt là tia phân giác của x O z ^  và z O y ^ . Hỏi hai góc z O m ^  và góc z O n ^  có phụ nhau không? Có kề nhau không? Giải thích?

nhưn trình bày kiủ j

Rearrange the sentences to make meaningful sentences

of/ are/ Plastic/ of/ source/ the/ main/ bags/ one/ pollution.

A.Plastic bags are the one of main source of pollution.

B. Plastic bags are one of source of the main pollution.

C. Plastic bags are one of the main source of pollution.

D. Plastic of bags are one pollution of the main source.

Dòng nào không phải là mục đích của việc tóm tắt văn bản tự sự?

A. Để dễ ghi nhớ nội dung của văn bản.

B. Để giới thiệu cho người nghe biết nội dung của văn bản. 

C. Giúp người đọc và người nghe nắm được nội dung của văn bản.

D. Thể hiện trình độ hiểu biết sâu rộng của người đọc. 

bày đặt

ít ảnh thôi bạn nhé

Cho ∫ a d f ( x ) d x = 5 , ∫ b d f ( x ) d x = 2 . Tính ∫ b a f ( x ) d x .

A. 7

B. 3

C. 0

D. -3

bạn vẽ bằng bút mực à siêu quá nhả ko có vết tẩy luôn [ý kiến riêng đừng ném đá ]

1:MỞ TỦ

2:CHO CON VOI VÀO TỦ

3:ĐÔNG TỦ LẠNH