kêt qua = 117 ban nha

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

A rather surprising geographical feature of Antarctica is that a huge freshwater, one of the world's largest and deepest, lies hidden there under four kilometers of ice. Now known as Lake Vostok, this huge body of water is located under the ice block that comprises Antarctica. The lake is able to exist in its unfrozen state beneath this block of ice because its waters are warned by geothermal heat from the earth's core. This thick glacier above Lake Vostok actually insulates it from frigid temperatures (the lowest ever recorded on Earth) on the surface.

The lake was first discovered in the 1970s while a research team was conducting an aerial survey of the area. Radio waves from the survey equipment penetrated the ice and revealed a body of water of indeterminate size. It was not until much more recently that data collected by satellite made scientists aware of the tremendous size of the lake; satellite-borne radar detected an extremely flat region where the ice remains level because it is floating on the water of the lake.

The discovery of such a huge fresh water lake trapped under Antarctica is of interest to the scientific community because of the potential that the lake contains ancient microbes that have survived for thousands upon thousands of years, unaffected by factors such as nuclear fallout and elevated ultraviolet light that have affected organisms in more exposed areas. The downside of the discovery, however, lies in the difficulty of conducting research on the lake in such a harsh climate and in the problems associated with obtaining uncontaminated samples from the lake without actually exposing the lake to contamination. Scientists are looking for possible ways to accomplish this.

The paragraph following the passage most probably discusses _________.

A. further discoveries on the surface of Antarctica

B. problems with satellite-borne radar equipment

C. ways to study Lake Vostok without contaminating it

D. the harsh climate of Antarctica

nói nek, câu nào cx có: P/s:CTV đừng xóa rồi xóa câu này là sai!!!

chắc ko ai dám xóa quá

tốn công vô ích

Tự tập hát ik tặng thầy cô vì sắp hè rồi

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

Smoking is an extremely harmful habit. You should give it up immediately.

A. When you give up smoking immediately, you will affect your health with this harmful habit.

B. Stop your smoking immediately so it will become one of your extremely harmful habits.

C. You should give up smoking immediately and you will fall into an extremely harmful habit.

D. As smoking is an extremely harmful habit, you should give it up immediately.

729 , ủng hộ mk nha

Chọn phát biểu đúng: 

A. Trong môi trường axit, ion  Cr 3 + có tính khử mạnh

B. Trong môi trường kiềm, ion  Cr 3 +  có tính oxi hóa mạnh

C. Trong dung dịch ion  Cr 3 +   có tính lưỡng tính

D. Trong dung dịch ion  Cr 3 +  vừa có tính oxi hóa vừa có tính khử

t chỉ muốn ns CTV quá đáng lắm lun, dù chỉ để giải trí cũng không cho nx, mệt lắm lun

t khinh nhất trên đời này là loại người dựa vào chức quyền của mình mà hành hạ người khác

cho hỏi thêm câu 7, 8