Cho tam giác nhọn ABC, trực tâm H, M là trung điểm của BC. Qua H kẻ đường thẳng vuông góc với HM, cắt AB,AC theo thứ tự ở E,F

1, Trên tia đối của tia HC lấy điểm D sao cho HD = HC. CM: E là trực tâm của tam giác BDH

2, CM: HE = HF

Cho đoạn thằng AB lấy điểm C sao cho AC > BC. Trên cùng 1 nửa mặt phẳng bờ AB vẽ các tam giác đều ACD và BCE. Gọi M,N,P,Q lần lượt là trung điểm của AE,CD,BD,CE

1, Tứ giác MNPQ là hình gì

2, CM: 2MP = DE

Cho tam giác nhọn ABC, trực tâm H, M là trung điểm của BC. Qua H kẻ đường thẳng vuông góc với HM, cắt AB,AC theo thứ tự ở E,F

1, Trên tia đối của tia HC lấy điểm D sao cho HD = HC. CM: E là trực tâm của tam giác BDH

2, CM: HE = HF

Help T.T

Cho đoạn thằng AB lấy điểm C sao cho AC > BC. Trên cùng 1 nửa mặt phẳng bờ AB vẽ các tam giác đều ACD và BCE. Gọi M,N,P,Q lần lượt là trung điểm của AE,CD,BD,CE

1, Tứ giác MNPQ là hình gì

2, CM: 2MN = DE

Help T.T

Với x là số thực,tìm giá trị nhỏ nhất của các biểu thức sau:

1, A = 2x^2 - 8x + 1

2, B = x^2 + 3x + 2 

3, C = 4x^2 - 8x 

4, D = \(\dfrac{1}{5−x^2−2x}\)

People who enjoy skiing dream of skiing in exotic places. These days they don’t have to limit themselves to just the Rocky Mountains or the Swiss Alps. Now they can ski in Dubai as well! That’s right. Dubai, the most populated city in the United Arab Emirates, has a ski resort.

Ski Dubai opened for business in 2005. Other than being the world’s third largest indoor ski facility, Ski Dubai has a number of things to amaze visitors. First and foremost, this ski facility was built in a place where there are no natural hills and it never snows. While the desert outdoors can reach 45°C in the summer, the slopes of Ski Dubai are kept at a cool -2°C all year round.

Like any other ski resort, Ski Dubai has a chairlift and ski instructors. It also boasts a Swiss style café on the slopes where skiers can rest and warm up. However, that’s not all. Along with being able to enjoy the five indoor slopes, including a black diamond slope, visitors are welcome to build snowmen in a designated area. Children can also enjoy snowball fights in the snowball throwing gallery, or they can explore a snow cavern filled with amazing things for kids to see and do.

As if all of that were not enough, it is also possible for guests to experience falling snow from time to time. When it is time to make new snow inside the facility, the temperature drops to -8°C. Then snow guns shoot out chilled water to make a cloud near the ceiling. Tiny particles of ice are shot into the cloud to form snow crystals. This manmade snow falls from the ceiling on excited guests below. When Raed Al Yousofi, a guest at Ski Dubai, experienced his first snowfall, he said, “It’s very strange but wonderful.” That is certainly an apt description of Ski.

36. What is the main idea of this reading? 

A. What Ski Dubai has                                                B. Where the idea of Ski Dubai came from

C. Who made Ski Dubai possible                                             D. Why Ski Dubai needed to be built

37. The word “from time to time” in paragraph 4 is closest in meaning to ______

A. usually        B. often                       C. sometimes              D. rarely

38. Which of the following is NOT found at Ski Dubai? 

A. A black diamond slope                                                        B.  A place to eat inside the facility

C. A place to just play in the snow                                          D.  A slope with a ski jump

39. What happens when the facility needs to make new snow?

A. A cloud is made above the slopes.                          B.  All the guests are asked to exit.

C. Chilled water is put on the slopes.                          D.  Particles of ice are mixed with real snow.

40. Which of the following can be inferred about Raed Al Yousofi? 

A. He is good at winter sports.                                                B. He had never seen snow before.

C. He used to live in a cold country.                                        D. He works at Ski Dubai.

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SINGALONG

There was a time in Britain when ‘singalong’ meant going to the pub and singing traditional songs accompanied by a pianist but that changed in the 1980s when karaoke nights were first (41) ______ and people sang popular songs to recorded backing music. The latest craze in singalong takes the idea to a new (42) ______ with singalong evenings in the theatres with (43) ______of other people while watching classic musical films like The Sound of Music. Costumes are not compulsory but they are (44) ______ recommended and there is great inventiveness on display.

The evening begins with a live show (45) ______ the host warms the audience up, judges a fancy dress competition and (46) ______ the prizes. The audience then sit back and watch the film with the lyrics of

the songs on the screen and sing at the top of their (47) ______.

Now the fashion has even (48)______ to opera so that when Puccini’s Turandot played at Covent Garden Opera House last year the chorus master gave the crowds outside (49) ______ on  twelve outdoor screens a lesson in how to sing along to Nessun Dormo, the opera's best (50)______aria.

41. A. presented                                         B. admitted                          C. attached                                                   D. introduced

42. A. level                              B. point                       C. degree                                D. part

43. A. quantities                      B. loads                       C. numbers                             D. amounts

44. A. exceedingly                  B. awfully                    C. highly                                  D. extremely

45. A. how                               B. when                       C. in which                              D. that

46. A. includes                         B. deals                       C. serves                                 D. awards

47. A. mouths                          B. voices                      C. hearts                                 D. heads

4 8. A. spread                          B. distributed              C. stretched                            D. multiplied

49. A. watched                         B. to watch                  C. who watched                      D. watching

50 A. familiar                          B. memorable             C. known                                 D. common

Bạn nào bt thì làm hộ mik cái