giúp mk zới câu a,b là đc gòi tiện thì giúp lun câu c nha ...

The world’s population is getting bigger and bigger. There’s a population explosion in some countries. I’m not sure if this is good or bad. The Earth can only support a limited number of people. One day, the world’s population will be too big to feed everyone. When that happens, we’ll have food wars and water wars. Many years ago, the population was controlled by famines, a shorter lifespan, disease and other natural causes. We are richer now and so we can control how long we live. This is already causing problems in some countries. Japan, for example, has almost more retired people than working people. This means workers can’t make enough money to look after old people.

(x+1)+(x+4)+(x+7)+(x+10)+.......+(x+28)=155

mn ơi giải hộ em bài liên từ nối với ạ and/but/so/because/although she still helped her brother with his homework. she was tired it's raining hard.We can't go to the beach

26. He was killed while attempting to ______ the Pacific Ocean in a hot air balloon. A. go through B. swim C. ride D. cross 27. The grammar book ______ lists of irregular verbs, phrasal verbs, and spelling rules. A. exists B. resumes C. includes D. continues 28. We ______ the eggs for about seven minutes. A. boiled B. dived C. drunk D. kept 29. If you don't study harder, you will probably _______ your test. A. pass B. fail C. enjoy D. succeed 30. The idea of working on this project really ______ me, even if I am a little nervous. A. excites B. dislike C. pay D. lack 31. This school was ______ in 1997 A. made B. built C. laid D. stopped 32. Last week I ______ my children to the biggest zoo in town. A. got B. brought C. fetch D. took 33. Do you ______ stamps or other things? A. pick B. grasp C. catch D. collect 34. This ruler is ______ of plastic A. made B. done C. got D. kept 35. I ______ that she is suitable for this position. A. speak B. think C. like D. want 36. I ______ that we should go home now. A. have B. is having C. feel D. is feeling 37. The soup ______ very delicious. A. tastes B. is tasting C. releases D. is releasing 38. These flowers ______ sweet. A. taste B. appear C. feel D. smell 39. I ______ what you mean. A. think B. point C. see D. lie 40. Do you want to go to the cinema with us this weekend? – Ah, let me ______. A. see B. hear C. watch D. look 41. She always ______ calm in every situation. A. exists B. stays C. includes D. dares 42. Thomas ______ disappointed about the result of the test. A. thinks B. supposes C. disappears D. appears 43. She ______ 20 this December. A. comes B. turns C. gains D. receives 44. He is ______ on Broadway tonight. A. meeting B. greeting C. appearing D. driving 45. My mother is ______ the soup in the kitchen. A. taste B. tasting C. handle D. handling 46. She ______ me to use her pen. A. let B. help C. allow D. argue 47. What I like is to swim in the sea and then to ______ on the warm sand. A. stand B. lie C. sleep D. sing 48. It was late, so we ______ to take a taxi home. A. supposed B. decided C. agreed D. touched 49. I ______ it difficult to learn English vocabulary. A. hate B. dislike C. hear D. find 50. I ______ something burning in the kitchen. A. taste B. note C. smell D. feel

Cho điểm O nằm giữa hai điểm A, B. Hãy kể tên các tia đối nhau, các tia trùng nhau.

1.would you turn off the light , please ? ( mind) => do you ............................... 2. he is too young to ride a motorbike ( enough) => he isn't .............................. 3. she is such a busy woman that she can't do the housework ( so) => she is ................................. 4. nam spends two hours doing his homework every day ( takes ) => it ........................................ 5. nam started playing football in 2018 => nam has............................

điền dấu 1999/2000........2000/2001

Cho hai chất A và B, biết các phương trình mô tả sự phụ thuộc vào nhiệt độ của áp suất hơi bão hòa như sau: - Áp suất hơi trên pha lỏng của A và B: ln P A(L) (atm) = (a1 / T) + a2 và ln PB(L) (atm) = (b1 / T) + b2 - Áp suất hơi trên pha rắn của A: lnP A(r) (atm) = - m/T +n. a1×10^-2 = 33, a2 = 16, b1×10^-2 = 53, b2 = 20, m×10^-2= 38, n = 13. 2.1. Hãy xác định các thông số sau: a. Nhiệt độ và áp suất điểm ba, nhiệt thăng hoa, nhiệt hóa hơi, nhiệt nóng chảy của chất A. b. Nhiệt độ sôi ở điều kiện thường của chất A và B (ký hiệu là Ts,A và Ts,B). hóa lý 1

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