Đúng ghi Đ, sai ghi S vào ô trống : Cho bốn số : 7582; 3474; 4665; 2970

d) Những số chia hết cho cả 2, 3, 5, 9 là 2970 ▭

 Phép lịch sự sẽ giúp cho mọi người?

A. yêu thương nhau hơn.

B. đoàn kết nhau hơn.

C. gần gũi nhau hơn.

D. hòa đồng nhau hơn.

Ở một loài xét 4 cặp gen dị hợp nằm trên 3 cặp nhiễm sắc thể. Khi đem lai giữa hai cơ thể P: A b a B DdEe x  A b a B DdEe, thu được F 1 . Biết cấu trúc của NST không thay đổi trong quá trình giảm phân. Tính theo lý thuyết, trong số cá thể được tạo ra ở F₁ số cá thể có kiểu hình mang hai tính trạng trội và hai tính trạng lặn chiếm tỷ lệ

A. 1 32

B. 7 32

C. 1 8

D.  9 64

Hàm số y = tan(x+ π/5) có phải là hàm số lẻ không?Tại sao?

Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction in each of the following questions.

The(A)  girl whom(B) I borrowed the dictionary asked me to(C) use it carefully(D) 

A. The

B. whom

C. asked me to

D. carefull

The chart ________ the massive amount of food consumed by the young in 2015.

A. occupies

B. illustrates

C. behinds

D. predicts

Cho 5,4 gam chất X có CTPT là C₂H₈O₃N₂ tác dụng với dung dịch chứa 0,12 mol KOH đun nóng thu được chất khí làm xanh quỳ tím ẩm và dung dịch Y. Cô cạn dung dịch Y thu được m gam chất rắn khan. Giá trị của m là? 

A. 8,14

B. 8,25

C. 9,13

D. 8,97

CÁCH PHÁT ÂM CỦA ÂM VỊ TRONG TỪ

Chọn 01 trong 04 lựa chọn có phần gạch chân có cách phát âm khác với những lựa chọn còn lại.

A. horses

B. produces

C. provinces

D. houses

Read the passage carefully and choose correct answer for each question below.

Education is another area of social life in which information technology is changing the way we communicate. Today's college students may not simple sit in a lecture or a library to learn about their field. Through their computers and the wonders of virtual reality they can participate in lifelike stimulated experiences. Consider the following scenario of the future of education made possible through developments in information technology.

For children over the age of 10, daily attendance at schools is not compulsory. Some of the older children attend school only once or twice a week to get tutorial support or instruction from a teacher. For the most part, pupils are encouraged to work online from home. Students should complete a minimum number of study hour per year; however, they may make up these hours by studying at home at times that suit their family schedule. They can log on early or late in the day and even join live classes in other countries. In order to ensure that each student is learning adequately, computer software will automatically monitor the number hours a week each student studies online as well as student's learning materials and assessment activities. Reports will be available for parents and teachers. The software can then identify the best learning activities and conditions for each individual student and generate similar activities. It can be also identify areas of weak achievement and produce special programs adjusted to the students' needs.

What can the software do?

A. Identify the best learning activities.

B. Generate similar activities.

C. Identify areas of week achievement and produce special programs.

D. All are correct.

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 .

      An air pollutant is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established inEngland in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled - a far cry from the extensive list of harmful substances known today. As technology has developed and knowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapor might be considered an air pollutant under certain conditions.

      Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and nitrogen oxides, are found in nature. As the Earth developed, the concentration of these pollutants was altered by various chemical reactions; they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil. On a global basis, nature's output of these compounds dwarfs that resulting from human activities.

      However, human production usually occurs in a localized area, such as a city. In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles. The result is an increased concentration of noxious chemicals in the air. The concentrations at which the adverse effects appear will be greater than the concentrations that the pollutants would have in the absence of human activities. The actual concentration need not be large for a substance to be a pollutant; in fact, the numerical value tells us little until we know how much of an increase this represents over the concentration that would occur naturally in the area. For example, sulfur dioxide has detectable health effects at 0.08 parts per million (ppm), which is about 400 times its natural level. Carbon monoxide, however, has a natural level of 0.1 ppm and is not usually a pollutant until its level reaches about 15 ppm.

The word "detectable" in the third paragraph is closest in meaning to_________.

A. beneficial

B. special

C. measurable

D. separable