Xét ΔKLM:
∠K + ∠M + ∠L = 180 độ
Mà ∠K = ∠M = 60 độ
=> ∠L = 60 độ
=> ΔKLM là tam giác đều ( tam giác cố 3 góc bằng nhau bằng 60 độ )
=> KL = LM = KM = 18 cm
Chu vi tam giác đó là: 18 + 18 + 18 = 54 cm
BÀI TẬP TRẮC NGHIỆM CHUYÊN ĐỀ 2: CÁC THÌ THƯỜNG GẶP( PHẦN 1) THÌ HIỆN TẠI ĐƠN, HIỆN TẠI TIẾP DIỄN, QUÁ KHỨ ĐƠN, hay QUÁ KHỨ TIẾP DIỄN? 1.My mother _______ the newspaper now. A. read B.reads C.reading D. is reading 2. Those children _______ for 2 hours every afternoon. A. sleep B. sleeps C. is sleeping D. are sleeping 3.We always _______ our English lessons carefully. A. do B. does C. is doing D. are doing 4. At present, he _______ for a foreign company. A. work B. works C. is working D. are working 5.The earth _______ around the sun once every 365 days. A. go B. goes C. is going D. are going 6.Where _______ now ? I _______ to the theatre. A. do you go/go B. are you going/ go C. are you going/ are going D. are you going/ am going 7. The students _______ all of the new words very well now. A. know B. knows C. is knowing D. are knowing 8. Just a minute! I _______ that word in the dictionary. A.look B. looks C. looking D. am looking 9. We _______ the use of verbs in English at the moment. A. study B. studies C. is studying D. are studying 10.The teacher _______ at the board when he _______ to explain something. A. point/ want B. points/wants C.points/ is wanting D. is pointing/ is wanting 11. It _______ when I got up this morning. A. rains B. rained C. is raining D. was raining 12. Albert Einstein _______ in 1955. A. dies B. is dying C. died D. was dying 13. They _______ in the library when the fire alarm went off. A. study B. are studying C. studied D. were studying 14. What _______ when you arrived there? A. does she do B. she did C.was she doing D. were she doing 15. He _______ economics at Harvard for almost 50 years. A. teach B. taught C.was teaching D. were teaching 16. Helen _______ in the lobby, wasn’t she? A. works B. worked C. was working D. wrere working 17.Mr. Thanh _______ to the office twice yesterday. A. goes B. went C. was working D. were working 18. The wind _______ very hard when I went out this morning. A. blows B. is blowing C. was blowinng D. were blowing 19. He fell while he _______ down the stairs. A. goes B. is going C. was going D. were going 20. What _______ when you saw him ? He _______ a kite. A.does Ba do/ is flying B. did Ba do/ was flying C. was Ba doing/ flew D. was Ba doing/ was flying
số lớn nhất có 6 chữ số chia hết cho 3 và ko chia hết cho 9
I. Choose the words whose underlined part is pronounced differently from that of the others in each group. 1. A. measure B. leather C. mean D. feather 2. A. treatment B. earplug C. hearing D. fear 3. A. poison B. visual C. measure D. pleasure 4. A. thermal B. litter C. permanent D. service 5. A. affect B. cholera C. pollutant D. radiation II. Choose the word whose main stressed syllable is placed differently from that of the other in each group. 1. A. repetitive B. electrical C. priority D. energetic 2. A. national B. physical C. arrival D. natural 3. A. medical B. national C. chemical D. informal 4. A. dramatic B. tornado C. historic D. injury 5. A. aquatic B. problematic C. influential D. degradable PART B : LANGUAGE FOCUS I. Choose the best answer A, B, C or D to complete the sentences: 1. It ______________ possible to save the earth if we don’t have actions right now. A.is B. will be C. to be D. is being 2. The USA has a population of about 304 million, and it’s the third ____________ country in the word. A. smallest B. largest C. narrowest D. highest. 3. _____________ is the most common natural disaster in your country ? - Snowstorms. A. What B. Where C. How D. Who 4. _______________ you ever been to any English speaking countries? A. Do B. Have C .Were D. Are 5. The teacher said _____________ a weak off on the occasion of the International Labor Day. A. we will have B. we didn’t have C. we have D. we would have 6. My father is fond _________________watching football matches on TV. A. to B. from C. of D. on 7. My sister has been living in Da Lat for two years; ________________, she has never been to Than Tho Lake. A. however B. although C .if D. because 8. If people didn’t throw rubbish in the street, it ________________attractive. A. will look B. would look C. looked D. was looking 9. It’s snowing. Would you like to _______________ on Saturday or Sunday ? A. skiing B. go to ski C .go ski D. go skiing 10. On Christmas Eve, most big cities, especially London are ______________ with coloured lights across
4: Một vật có khối lượng riêng 400 kg/m³ thả trong một cốc đựng nước. Hỏi vật bị chìm bao nhiêu phần trăm thể tích của nó trong nước.
vẽ hình mô tả lại cách di chuyển của thằn lằn?
cho tam giác abc cân tại a.trên tia đối của tia bc lấy điểm d,trên tia đối của tia cb lấy điểm d, trên tia đối của tia cb lấy điểm e sao cho bd=ce a,chứng minh rằng tam giác ade là tam giác cân b,kẻ bh vuông góc ad(h thuộc ad),kẻ ck vuông góc ae (k thuộc ae).chứng minh rằng bh=ck c,gọi o là giao điểm của bh và ck. tam giác obc là tam giác gì?vì sao
: Một cánh cửa HCN được làm bằng sắt có chiều rộng là x (m) và chiều dài bằng 2 lần chiềurộng. a) Lập công thức tính diện tích cánh cửa theo x. b) Nếu chiều rộng cánh cửa bằng 1,5 (m) và mỗi mét vuông cửa có giá là 450 000 đồng. Tính giá tiền cánh cửa đó.
Tỉ số phần trăm của 3,6 và 4,5 là A. 0,8% B. 8% C. 0,08% D.80%
Ex5. Điền although hoặc despite/ in spite of hoặc however/ nevertheless vào chỗ trống: (1).................... Duong had lots of homework to do, he agreed to go shopping with his friend Nick. Nick loved to buy sportswear. (2)...................., Duong was more of a jeans and t-shirt kind of boy. (3)................ the rain, they set off on Sunday morning for the town centre. Nick, as always, had more cash than Duong. (4)....................., Duong was better at buying things cheaply or for less than their usual prices. They were hungry and had lunch at the local burger bar.(5).................. they had spent nearly all their money, there were still a few shops that Nick wanted to visit, and (6).................... having aching feet, Duong and Nick spent more hours shopping
Bài tập 3: Hãy đặt 10 câu chủ động sau đó chuyển đổi thành câu bị động theo hai cách. Bài tập 4: Hãy đặt 3 câu có cụm chủ vị làm các thành phần câu và thành tố cụm từ sau: - 1câu có cụm chủ vị làm các thành phần chủ ngữ. - 1câu có cụm chủ vị làm các thành phần vị ngữ. - 1câu có cụm chủ vị làm phụ ngữ( trong cụm danh từ, động từ, tính từ).
Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến