Hoàn thành các phương trình hóa học sau cho biết chúng thuộc loại phản ứng gì? a)?+ Mg→°t MgS b)?+O →AlO 2. 2 3 c)H O→H +O 2. 2. 2 d)CaCO →t° CaO+CO 3. 2

1. To ...........a bad habit, such as smoking and gambling, is not quite easy to most of human being.A.divideB. overcomeC. revealD.investigate 2. John’s father is a .............scientist. He studies life in the sea. A.marineB.underseaC.submarineD.organism 3. In some countries, teenagers can live ..........oftheir parents if they want.A.dependentlyB. independentC.independentlyD.independence 4. The authority supplied the victims of the fire ..............food, clothes, and money.A.onB.forC.toD.with 5. The existence of different kinds of animals and plants which make a balanced environment is called.........A. biodiversityB.challengeC.rubbishD. maintain 6. Oil spills are a great...........to the undersea world. A.threatB.threatenC.threatenedD.threateningly 7. Sea life has a strong ......on the composition of sea water.A. challengeB.informationC.investigationD.influenceChoose the word which has the SAME meaning with the underlined word 8. They spent their childhood in a tinyfishery village by the sea. A. smallB.enormousC.bigD.large 9. He is always interested in the mysterious that lie beneaththe ocean. A.overB.underC.aboveD.on 10. Sperm whale population are at riskdue to hunting.A. at handB.on purpose C.in dangerD.in use

giúp mk với được k ạ mk cần gấp

II. Complete each sentence with the correct word from the box. drought flood hurricane landslide tornado 1.When there is a _____________, a lot of water covers an area where the usually isn’t water. 2. A______________ refers to a long time without rain. 3. When there is _____________, a lot of rocks and earth fall down a hill. 4. A __________________ is a storm with a lot of wind that moves over water. 5. A__________________ is a storm in which the air moves very quickly in a circle.

Giải bt bằng cách lập hpt giúp mk với

Câu 16: Nếu ta nhập 100-100 vào ô E15 trong bảng tính Excel thì kết quả sẽ ở vị trí nào trong ô? Không biết trước Giữa Bên trái Bên phải

I.Choose the word in each line that has different stress pattern. 1.A. ecology B. environment C. autography D. residential 2. A. physiography B. alternatively C. criminology D. unsuccessfully 3. A. temporary B. geology C. emergency D. logography 4. A. astrology B. unnatural C. medication D. demography 5. A. voluntary B. apology C. television D. nationalize

Ai giúp em phần đọc hiểu với ạ. 3 câu đầu cũng được ạ :(

m.n chỉ mik câu 5 đi ạ. mik đg gấp.

Cho ΔABC thỏa mãn 2cosB=√2. Khi đó: A. B=$30^{o}$ B. B=$60^{o}$ C. B=$45^{o}$ D. B=$75^{o}$