Các bạn giúp mình với, mình cần gấp ạ

Cho em hỏi bài này làm sao để ra câu B ạ

Cho hai góc AOB và A'OB' có các tia phân giác tương ứng là OC và OC'.Chứng minh rằng nếu OA và OA' là hai tia đối nhau,OC và OC' là hai tia đối nhau thì OB và OB' cũng là hai tia đối nhau?

Hãy viết đoạn văn nghị luận xã hội khoảng 200 chữ bàn luận về ý nghĩa của viêc học Ngữ văn Giúp em với ạ

Tính A) (-40/41.0,32.17/20):64/75 B) -10/11.8/9+7/18.10/11

I. Use the words / phrases in the box to complete the following sentences. Dusty area exercising low-fat food junk food rubbish littering 1. Some people have a very bad habit of …………….in public. They throw used things anywhere. 2. It’s harmful for your body if you eat a lot of …………………. 3. ………….like running, playing ping pong can help you to stay in shape. 4. A public place should have a dust bin for people to throw …………in. 5. A good diet contains…………………. 6. People who live in ………………………….often suffer from diseases.

Adolescence is the period ________ child and young adulthood a. for b.between c.and d.from 2.Your body will change in shape and________ a.height b.high c.tall d.taller 3.Your brain will grow and you’ll have improved self-control and_______ skills a.housekeeping b.reasoning c.social d.emotion control 4.They can’t decide who _______ first a.go b.to go c.went d.going 5.The girls are making fun ____ me so I’mvery embarresed a.to b.for c.with d.of 6.Physical changes are different for every, so you don’t need to feel embarrased or______ a.frustrated b.tense c.confident d.delighted 7.I wish my parents could put themselves in my ______ a.situation b.shoes c.feelings d.heart 8.Do you need to be that stressed______? a.on b.in c.out d.with 9.My mother is a strong person. She stays_____ even in the worst situations a.calm b.healthy c.tense d.confident 10.You’ve been a bit tense lately so you need to _____ a break. a.get b.take c.has d.let 11.His father wants him to get the_____ score in this exam a. high b.higher c.highest d.as high as 12.She has ______because she has a big assignment to complete a.frustration b.frustrated c.frustrating d.frustratedly 13. We need to prepare food, do laundry and chores at home. It’s _________ a. Social skill b. Self-care skills c.Housekeeping skill d.Cognitive skills 14.I’ve won an essay contest. ---- _______________! a. Congratulations! b.It’s interesting c.Oh poor! d. Good! 15.Your friend stayed up late studying for an important exam. a. Well done! c.I know how you feel b.Stay calm. Everything will be all right. D.A really great job. 16.The two countries agreed to _____ full diplomatic relations. a.give up b.set up c.deal with d.over come 17.It’s difficult to _____ changes in technology. a. go with b.look through c.keep up with d.turn up 18.Six people applied for the job, but four of them were ______ a.turned down b.turned up c.turned on d.turned off 19. It I ______ in your shoes, I’d take it easy and try to forget it. a.are b.am c.were d.have 20.We should cooperate with others and resolve conflicts or have communication skills . It’s__________ a.Social skills b.Housekeeping skills c.Emotion control skills d.Self-care skills 21.Magic number 18001567 is a _____toll free service. a. 24 hours b. 24-hours c. 24 – hour d.24 hour

a ) /x + 4/ + /y-2/ = 3 ( / là giá trị tuyệt đối nhé mình cần gấp lắm ) b ) / 2x + 1 / + / y - 1 / = 4 ( / là giá trị tuyệt đối nhé mình cần gấp lắm ) 5 sao cho ai lm đúng và đủ nhất

Trình bày 1 đoạn văn ngắn về vì sao nói lối sống của hồ chí minh là 1 cách di dưỡng tinh thần

What is your morning routines ?