ABCD.A1B1C1D1 là một hình lập phương (h.81). Quan sát hình và cho biết:

a) Những cạnh nào song song với cạnh C1C?

b) Những cạnh nào song song với A1D1?

My dream school

In the future, schools will better. Computers will be much quicker and we might have pencils which write for us! All the students will have their own computers.

When there is a history lesson, the computers will show important events. The students will be dressed up as the characters from the period they are studying. There will be hover boards in the playground, and students will come to school by hover cars.

Every child will have a robot like themselves. The robots will have to go to school while the students sit at home controlling them in front of their computers. The robots will have laser pens and the student will have laser ink pens.

The classroom will be floating, and the tables and chairs will, too. There will be no homework, and teachers won't take away the toys.

1. The students wants all of the following but not _________.

A. having laser ink pens

B. going to school

C. staying at home controlling a robot

D. having a robor like himself

2. In history lessonsm, the student wants the computer to _______________.

A. show important people in history events.

B. have new games

C. show history events and the students will be one of the important characters

D. find all information about the events from the Internet

3. If the history lesson today is about ancient Egypt, the student will _________.

A. watch films about Egypt on the computer

B. become the queen

C. get dressed like the queen

D. see things and houses at the time

4. The student wants to have _________.

A. floating classroms

B. no homework

C. toys in the classroom

D. all A, B, and C

5. The word hover in the paragraph 2 means ________.

A. colourful

B. flying

C. moving

D. large

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.

  Composers today use a wider variety of sounds than ever before, including many that were once considered undesirable noises. Composer Edgard Varese (1883-1965) called thus the "liberation of sound...the right to make music with any and all sounds." Electronic music, for example - made with the aid of computers, synthesizers, and electronic instruments - may include sounds that in the past would not have been considered musical.

  Environmental sounds, such as thunder, and electronically generated hisses and blips can be recorded, manipulated, and then incorporated into a musical composition. But composers also draw novel sounds from voices and non-electronic instruments. Singers may be asked to scream, laugh, groan, sneeze, or to sing phonetic sounds rather than words. Wind and string players may lap or scrape their instruments A brass or woodwind player may hum while playing, to produce two pitches at once; a pianist may reach inside the piano to pluck a string and then run a metal blade along it. In the music of the Western world, the greatest expansion and experimentation have involved percussion instruments, which outnumber strings and winds in many recent compositions. Traditional percussion instruments are struck with new types of beaters; and instruments that used to be couriered unconventional in Western music - tom-toms, bongos, slapsticks, maracas - are widely used.

          In the search for novel sounds, increased use has been made in Western music of Microtones. Non- Western music typically divides and intervals between two pitches more finely than Western music does, thereby producing a greater number of distinct tones or micro tones, within the same interval. Composers such as Krzysztof Penderecki create sound that borders on electronic noise through tone clusters - closely spaced tones played together and heard as a mass, block, or band of sound. The directional aspect of sound has taken on new importance as well Loudspeakers or groups of instruments may be placed at opposite ends of the stage, in the balcony, or at the back and sides of the auditorium. Because standard music notation makes no provision for many of these innovations, recent music scores may contain graph like diagrams, new note shapes and symbols, and novel ways of arranging notation on the page.

According to the passage, Krzysztof Penderecki is known for which of the following practices?

A. Using tones that are clumped together

B. Combining traditional and nontraditional instruments

C. Seating musicians in unusual areas of an auditorium

D. Playing Western music for non-Westem audiences

2 Như

Lưu Khánh Linh nè

b)

Nghiên cứu sự di truyền ở một quần thể thực vật tự thụ phấn bắt buộc, thế hệ xuất phát có cấu trúc di truyền dạng 0,2AA (quả dài): 0,3Aa (quả bầu): 0,5aa (quả tròn). Quần thể này trải qua một số thế hệ, các cá thể có đời sống ngắn và chết sau khi tạo hạt đời con. Khi một học sinh khảo sát 1 quần thể đời sau đếm được 1280 cây trong đó có 48 cây quả bầu. Số cây quả dài và số cây quả tròn tương ứng là:

A. 424 quả dài và 808 quả tròn 

B. 424 quả dài và 964 quả tròn 

C. 768 quả dài và 448 quả tròn 

D. 808 quả dài và 424 quả tròn

Cho bảng số liệu:

CHỈ SỐ PHÁT TRIỂN ĐÀN GIA SÚC, GIA CẦM NƯỚC TA GIAI ĐOẠN 2009 - 2014

(Đơn vị: %)

(Nguồn: Niên giám Thống kê Việt Nam năm 2014, NXB Thống kê, 2015)

Theo bảng số liệu trên, để thể hiện tốc độ tăng trưởng đàn gia súc, gia cầm nước ta giai đoạn 2009 - 2014, biểu nào sau đây thích hợp nhất?

A. Cột.

B. Đường.

C. Miền.

D. Tròn.