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.

In the United States, it is important to be on time, or punctual, for an appointment, a class, a meeting, etc... This may not be true in some other countries, however. An American professor discovered this difference while teaching a class in a Brazilian university. The two-hour class was scheduled to begin at 10 a.m, and end at 12 a.m. On the first day, when the professor arrived on time, no one was in the classroom. Many students came after 11 a.m. Although all of the students greeted the professor as they arrived, few apologised for their lateness. Were these students being rude? He decided to study the students’ behavior.

In American university, students are expected to arrive at the appointed hour. On the other hand, in Brazil, neither the teacher nor the students always arrive at the appointed hour. Classes not only begin at the scheduled time in the United States, but they also end at the scheduled time. In the Brazilian class, only a few students left the class at noon, many remained past 12:30 to discuss the class and ask more questions. While arriving late may not be important in Brazil, neither is staying late.

The explanation for these differences is complicated. People from Brazilian and North American cultures have different feelings about lateness. In Brazil, the students believe that a person who usually arrives late is probably more successful than a person who is always on time. In fact, Brazilians expect a person with status or prestige to arrive late, while in the United States, lateness is usually considered to be disrespectful and unacceptable. Consequently, if a Brazilian is late for an appointment with a North America, the American may misinterpret the reason for the lateness and become angry.

As a result for his study, the professor learned that the Brazilian students were not being disrespectful to him. Instead, they were simply behaving the appropriate way for a Brazilian student in Brazil. Eventually, the professor was able to adapt his own behavior to feel comfortable in the new culture.

The word "misinterpret" is closest in meaning to _______.

A. mismanage 

B. misread 

C. misunderstand 

D. misreport 

Muối nào sau đây được dùng làm xà phòng 

A. C₁₇H₃₅COONa

B. HOOC-CH₂-CH₂-CH(NH₂) COONa

C. CH₂=CHCOONa

D. CH₃CH(NH₂)COONa

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 35 to 42.

  Plants and animals will find it difficult to escape from or adjust to the effects of global wanning. Scientists have already observed shifts in the lifecycles of many plants and animals, such as flowers blooming earlier and birds hatching earlier in the spring. Many species have begun shifting where they live or their annual migration patterns due to warmer temperatures.

  With further warming, animals will tend to migrate towards the poles and up mountainsides towards higher elevations. Plants will also attempt to shift their ranges, seeking new areas as old habitats grow too warm. In many places, however, human development will prevent these shifts. Species that find cities or farmland blocking their way north or south may become extinct. Species living in unique ecosystems, such as those found in polar and mountaintop regions, are especially at risk because migration to new habitats is not possible. For example, polar bears and marine mammals in the Arctic are already threatened by dwindling sea ice but have nowhere farther north to go.

  Projecting species extinction due to global warming is extremely difficult. Some scientists have estimated that 20 to 50 percent of species could be committed to extinction with 2 to 3 Celsius degrees of further warming. The rate of warming, not just the magnitude, is extremely important for plants and animals. Some species and even entire ecosystems, such as certain types of forest, may not be able to adjust quickly enough and may disappear.

  Ocean ecosystems, especially fragile ones like coral reefs, will also be affected by global warming. Warmer ocean temperatures can cause coral to “bleach”, a state which if prolonged will lead to the death of the coral. Scientists estimate that even 1 Celsius degree of additional warming could lead to widespread bleaching and death of coral reefs around the world. Also, increasing carbon dioxide in the atmosphere enters the ocean and increases the acidity of ocean waters. This acidification further stresses ocean ecosystems.

(From "Global Warming" by Michael Mastrandrea and Stephen H, Schneider)

The word “fragile” in paragraph 4 most probably means _____________  .

A. very large

B. easily damaged 

C. rather strong

D. pretty hard

Cho các phát biểu sau:

(1) Nước cứng là nước có chứa nhiều cation Ca²⁺, Mg²⁺.

(2) Để làm mất tính cứng vĩnh cửu của nước có thể dùng dung dịch Ca(OH)₂ hoặc dung dịch Na₃PO₄.

(3) Không thể dùng nước vôi để làm mềm nước cứng tạm thời.

(4) Từ quặng đolomit có thể điều chế được kim loại Mg và Ca riêng biệt.

(5) Các kim loại K, Ca, Mg, Al được điều chế bằng cách điện phân nóng chảy muối clorua của tương ứng.

Số phát biểu đúng là

A. 5.                     

B. 3.                      

C. 2.                      

D. 4

CHO MÌNH SỬA TÍ NHA//

CHỖ HÔ HẤP LÀ HÚT KHÍ OXI VÀ NHẢ KHÍ CACBONIC

+Giong nhau:

-Đều là quá trình sinh lí có ý nghĩa quan trọng với cây.

-Đều có ảnh hưởng tới các điều kiện bên ngoài.

+Khác nhau:

*Quang hợp:

-Chỉ xảy ra ở các bộ phận có chứa chất diệp lục.

-Hút khí cacbonic và thải ra khí oxi.

-Xảy ra vào ban ngày,khi có ánh sáng.

-Chế tạo chât hữu cơ.

*Hô hấp:

-Xảy ra ở tất cả các bộ phận của cây.

-Hút khí cacbonic và nhả khí oxi.

-Xảy ra cả ngày và đêm.

-Phân giaỉ chất hữu cơ.

TÍCH NHA!!!