Chủ đề:
Ôn tập phương trình bậc hai một ẩnCâu hỏi:
Cho phương trình
x²-(2m+1)x+m(m-1)=0
Tìm các giá trị của m để phương trình không có hai nghiệm phân biệt cùng dương
Mọi người giúp mình ạ!!!
Write the correct for orange tense of the verbs in the brackets:
1. My father prefers... (work) as a farmer rather than a blue-collar worker.
2. I can't help...( worry) about her traveling abroad on her own.
3. Rubber sandals...( wear) by Vietnamese soldiers during the war against the French and the Americans
4.She(not think) of writing about educational reformation until I mentioned it.
5. In 1995, I...(go) back to Vietnam after 30 years.
6. In recent years, Vietnam...(experience) many changes under the influence of economic reform and globalization.
7. It's kind of you...(report) to her what happened to her son last night.
8. The number of vehicles in Vietnam...(increase) by 10 percent every year.
9. If you...(come) back to the ancient world, where would you visit?
10. During our conversation, I realised that we...(meet) before.
I. Use the words given in the box to complete the following sentences. The are two extra words you don't need to use.
ATHLETIC DOMESTIC ARTISTIC. MECHANICAL. TRAGIC. CHEMICAL. SYSTEMATIC. CRITICAL
1..... treatment with chlorine provides some protection against contamination.
2. She comes from a very.... family.
3. The university is very proud of its... facilities.
4. It would be... if her talent remained unrecognized.
5. The breakdown was due to a... failure.
6. The prisoner was subjected to... torture.
II. Give the correct form of the word in the brackets to complete the following sentences.
1. The company must reduce costs to complete....( effect)
2. The small blood vessels in the nose... easily. ( blood)
3. The barriers gave way under the... of the crowd.( press)
4. Filters do not remove all... from water. ( contaminate)
5. II will use one recent example as an.... ( illustrate)
6. I'll need to take your waist...( measure)
7. We no longer talk of the... of marriage. ( permanent)
8. There are various... available for this condition.(treat)
9. They emit 90% less... than standard models.( pollute)
10. It is important to take precise... of the structure.( measure)
GIÚP MÌNH NHA!!!
1. Chứng minh rằng địa hình đồi núi nước ta có sự phân hóa thành các vùng khác nhau?
2. Giải thích nguyên nhân dẫn đến sự phân hóa đa dạng địa hình nước ta?
3. Trình bày hướng địa hình chính và ảnh hưởng của nó đến địa hình nước ta?
4. Hãy nêu những thế mạnh và hạn chế của thiên nhiên khu vực đồi núi và khu vực đồng bằng đối với sự phát triển kinh tế xã hội ở nước ta?
5. Hãy cho biết đồng bằng sông Hồng và đồng bằng sông Cửu Long có những điểm gì giống và khác nhau về điều kiện hình thành, đặc điểm địa hình , đất?
GIÚP MÌNH NHA, 7/3 MÌNH PHẢI NỘP BÀI :))
Choose the world or phrase among A, B, C or D that best fits the blank space in the following passage.
London's Tower Bridge
London's Tower Bridge is one of the most famous (1)... in the world. The bridge, desgned by the architect Horace Jones together with John Wolfe Barry, was finally completed in 1894. It (2)... 11,000 tons of steel to build the framework of the 265-meter-long bridge. Over time, the bridge has become one of London's most famous (3)...
(4)... photographs of the Tower Bridge is a favourite London tourist activity, but you can also go inside the bridge, where you'll have a magnificent view over London from the walkway (5)... the two bridge towers.
In 2014, glass floors were installed in the walkways, giving visitors another, unusual view from the bridge. The long glass floors, more than 40 meters above the river, allow you to (6)... the traffic over the Tower Bridge from above. It is particularly (7)... to see the bridge (8)... and close below your feet.
1.A. bridge B. bridges C.tower D. towers
2.A. brought B. built C. took D. gave
3. A. symbols B. views C. landscapes D. scenes
4. A. To take B. Take C. Taking D. To taking
5. A. at B. between C. on D. in
6. A. watch B. follow C. record D. consider
7. A. fascinate B. fascination C. fascinated D. fascinating
8. A. open B. to open C. opened D. be opened
GIÚP MÌNH VỚI, MAI MÌNH PHẢI NỘP BÀI.