Trong không gian với hệ tọa độ Oxyz, cho các điểm A a ; 0 ; 0 , B 0 ; b ; 0 , C 0 ; 0 ; c  với a,b,c dương. Biết A, B, C di động trên các tia Ox,Oy,Oy sao cho a+b+c=2. Biết rằng khi a,b,c  thay đổi thì quỹ tích tâm hình cầu ngoại tiếp tứ diện OABC thuộc mặt phẳng (P) cố định. Tính khoảng cách từ M(2016;0;0) tới mặt phẳng (P).

A. 2017

B.  2014 3 .

C.  2016 3 .

D.  2015 3 .  

Fill in each numbered blank with one suitable word or phrase.

In the USA, futher education generally refers to education undertaken by adults of all ages after leaving full time study. It doesn’t include degree courses (1) ______ at college or university directly after leaving high school, which come under (2)______ education. Futher education includes everything from basic reading and writing skills for illiterate to full – time professional and doctorate degrees at university. On many university (3) ______, more students are enrolled in futher education courses than in (4)______ degree programmes. Often adult education students don’t need to be high school or college graduates or take any tests or interviews, and they’re generally (5)______ on a first – come, first – served basis. A high school diploma is (6)______ for some courses, although General Educational Development (GED) tests allow students to (7) ______ a high school equivalency diploma. Adult education courses may be full-time or part-time and are provided by two and four- year colleges, universities, community colleges, (8) ______ schools, and elementary and high schools. Courses are also provided by private community organizations, government (9) ______ , and job training centres. More and more adult education programmes are becoming (10) ______ on the Internet, including courses which offer university or continuing education credits for completion.

Question 10:

A. capable

B. available

C. visible

D. possible

Are these sentences True or False?

Question: Tom puts the dog outside.

A. True

B. False

Cho ∠AOB = 120°. Tia OC nằm giữa hai tia OA, OB sao cho ∠BOC = 30°. Chọn câu đúng:

A.  O A   ⊥   O C

B.  O B   ⊥   O C

C.  A O C ⏜   =   80 o

D.  A O C ⏜   =   75 o

Một hình vuông có diện tích bằng 64 cm 2 . Chu vi của hình vuông đó là:

A. 64 cm

B. 32  cm 2

C. 64  cm 2

D. 32 cm

Có mấy cách làm thay đổi nhiệt năng của vật 

A. 1

B. 2

C. 3

D. 4

Lớp học có 25 học sinh, trong đó có 13 nữ. Số học sinh nữ chiếm bao nhiêu phần trăm của lớp học đó?

A. 13 %

B. 25%

C. 52 %

D. 25 %

Viết số hoặc chữ thích hợp vào ô trống:

Lục giác đều có?

A. Có 6 cạnh bằng nhau và 6 góc bằng nhau. 

B. Có 6 cạnh bằng nhau và 6 góc bất kì 

C. Có 5 cạnh bằng nhau và 5 góc bằng nhau. 

D. Có 4 cạnh bằng nhau và 4 góc bằng nhau. 

Read the passage and statements below carefully, and then say whether the statements are true (T), false (F) or not given (No)

HOW ARE BALLET DANCERS TRAINED?

Girls who study ballet generally begin by age eight to ten. Boys often start later. Ballet training is hard work. Ballet students must develop strength, balance, and flexibility as well as grace. They must learn a set of movements and gestures. Girls also learn to dance on their toes. They usually begin pointe (tip-of-the-toes) work after three years of training.

All ballet students practice five basic positions of the feet. These five positions form the basis of almost all ballet steps. All of these positions are performed with the legs turned outward at the hip. The feet should be able to form a straight line on the floor.

The turned-out position gives a dancer a more pleasing “line.” Line has to do with the placement of the dancer’s body, in motion and at rest. All parts of the dancer’s body must be placed in the correct position to achieve good line. Training can improve a dancer’s line. Good line gives a dancer the greatest stability and ease of movement. It also makes the dancer’s body seem light in weight.

All dancers take daily classes to keep their bodies flexible and strong. Most classes begin with warm-up exercises at the barre, a railing that dancers hold onto for support. The second part of the class consists of slow exercises that develop balance and fluid (flowing, not jerky) motion. After this, dancers practice quick movements, such as small jumps and leg extensions, and then large steps, turns, and leaps.

Question: So as to keep their bodies flexible and strong all dancers take daily classes.

A. True

B. False

C. Not given (No)