Cho tứ giác ABCD có AC vuông góc với BD. Gọi E,F lần lượt là trung điểm của AB và BC. Đường thẳng qua E vuông góc với CD, cắt đường thẳng qua F vuông góc với AD o M. Chứng minh 3 điểm B, M, D thẳng hàng

A. is driving   

B. drive   

C. drives   

D. driving

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.

Vietnam officially became a full member of the Association of Southeast Asian Nations (ASEAN) on July 28, 1995. Since then, Vietnam has worked together with other ASEAN member countries to reinforce regional cooperation and made great contributions to maintaining peace , stability and reconciliation in the region.

In the past years in the ASEAN, Vietnam has reaped (obtained) many successes in all social and economic fields. The country has gradually restructured its administrative apparatus to suit a market economy and to integrate into the international community. Vietnam has made a good impression on ASEAN countries with its achievements in economic development especially in hunger eradication and poverty alleviation. ASEAN countries' investment into Vietnam has also increased sharply. With a high economic growth rate averaging seven percent each year, Vietnam has been able to decrease economic gap slightly with Thailand, Singapore, Malaysia, Indonesia, the Philippines and Brunei.

In addition, Vietnam actively works to integrate culturally and socially with the Southeast Asian region while preserving its own cultural features. Thirteen is not a long period for such an important political event but what has been achieved in relations between Vietnam and the association is creating splendid prospect for the future.

Question: Which is the best title of the passage?

A. How Vietnam joined ASEAN.

B. Vietnam's contributions to ASEAN's development.

C. Vietnam's achievements in relation with the ASEAN community.

D. Vietnam-ASEAN: a decade of companionship and development.

Biểu hiện của sống và làm việc khoa học là?

A. Chuẩn bị bài trước khi đến lớp.

B. Học trước chơi sau.

C. Nghe nhạc tiếng anh để học từ mới.

D. Cả A,B, C.

Tìm x\(\in\)Q sao cho: \(x+\dfrac{1}{x}\in Z\)

Cho hàm số f ( x ) = x 2 - x + 2 . Tính ∆f(1) và df(1)nếu ∆x=0,1.

A. ∆f(1)=0,11;df(1)=0,2

B. ∆f(1)=0,11;df(1)=0,1

C. ∆f(1)=0,2;df(1)=0,11

D. ∆f(1)=0,2;df(1)=0,1

Để tránh tác hại do ánh sáng quá mạnh gây ra, ta nên và không nên làm gì?

Viết (theo mẫu) :