Hỏi - Đáp

Toán học - Lớp 11

Lượng giác

t^2 -4t + 4a + 3 =0 √ -1≤t≤1

Toán học - Lớp 10

GIÚP MÌNH VỚI MỌI NGƯỜI ƠI

Cho tam giác ABC vuông tại A.Biết BC²=AC²(căn3 + 1)+AB.AC(căn3 - 1). Tính góc ABC

Tiếng Anh - Lớp 10

CỨU EM VỚI CÁC THẦY CÔ ƠI

21. As people get older their bodies begin to run…………...and they have less immunity to disease.
22. out B. low C. off D. down
23. They…………...his broken leg in plaster.
24. set B. fitted C. arranged D. tied
25. After climbing the stairs to the sixth floor, I was completely out of…………....
26. air B. breath C. wind D. gasp
27. The hospital called for volunteer blood…………...after their supplies ran low.
28. givers B. suppliers C. donors D. contributors
29. According to a hospital spokesman, hopes were …………... last night that the victim would ever regain consciousness.
30. decreasing B. increasing C. growing D. fading
31. After six months of convalescence in a nursing home, Simon is finally on the…………....
32. go B. top C. mend D. run
33. Exercising generally begins with standing up straight, …………...slowly and then, letting your breath out evenly.
34. inhaling B. exhaling C. ingesting D. airing
35. Try something sharp-smelling under her nose, that might…………...if she’s still unconscious.
36. bring her about B. bring her to C. get her over D. put her forward
37. Before the group of doctors would give their opinion they wanted to…………... with each other.
38. confide B. confess C. confirm D. confer
39. Peter was from hospital last week.
40. dismissed B. discharged C. released D. withdrawn
41. In the stomach, the protein in food is…………...down into simpler substances by the action of acids and enzymes.
42. broken B. knocked C. melted D. rendered
43. Doctors advise people who are deficient …………...Vitamin C to eat more fruit and vegetables.
44. for B. of C. from D. in
45. If you don’t get your full…………...of sleep, your work will begin to suffer.
46. extent B. quota C. degree D. ratio
47. Half an hour after the patient arrived at the hospital, doctors were…………...him.
48. operating B. operating for C. operating on D. operating to
49. I still feel weak and tired. It’s taking me longer to get…………...the operation than I thought it would.
50. over B. by C. up from D. through.
51. The doctors thought he had got over the worst,but his condition suddenly …………....
52. disintegrated B. dismantled C. deteriorated D. dissolved
53. In a five-hour operation, surgeons managed to sew the boy’s…………...hand back on.
54. severed B. grazed C. crushed D. cut
55. In the days before the widespread use of…………..., having an operation must have been a gruelling experience.
56. aesthetes B. anaesthetics C. aesthetics D. anaesthetists
57. The effects of the anaesthetic…………...after a couple of hours.
58. wore off B. finished off C. dried up D. wiped out
59. John needed…………...to remove his appendix.
60. help B. surgery C. medication D. attention
61. Although he is not fully…………...yet, he is making a good recovery.
62. vigorous B. vital C. energetic D. active
63. My father is suffering from a…………...infection.
64. respiratory B. respiration C. breathing D. breath
65. After a series of tests, the doctor was able to make a(n)…………....
66. opinion B. conclusion C. result D. diagnosis
67. You are advised not to engage in…………...activity during very hot weather.
68. stringent B. strained C. strenuous D. stern
69. He’s…………...his health, and takes dozens of vitamins every day.
70. enthusiastic about B. fascinated by C. obsessed in D. fanatical about
71. He still looks…………...after his illness.
72. discoloured B. fair C. pale D. dull
73. Too much exercise can be harmful but walking is good…………...you.
74. for B. by C. to D. with
75. I was pleased to see how…………...she looked after her recent illness.
76. right B. well C. pleasant D. nice
77. It is…………...that we drink eight glasses of water a day.
78. ordered B. advised C. insisted D. recommended
79. Dan keeps in…………...by exercising on a regular basis.
80. form B. condition C. shape D. health

Ngữ văn - Lớp 10

đọc và trả lời câu hỏi

Hóa học - Lớp 11

Hỗn hợp gồm 0 2 mol một hidrocacbon

hỗn hợp X gồm 0,2 mol một hidrocabon mạch hở và 0,35 mol hidro. Cho hỗn hợp X qua Ni nung nóng, sau một thời gian thu được hỗn hợp Y. Tỉ khối của hỗn hợp Y đối với hỗn hợp X là 2,2. Cho hỗn hợp Y qua dung dịch brom dư thấy có 0,3 mol Br2 đã phản ứng và thoát ra 1,792 lít hỗn hợp Z ( ở đtkc)  có tỷ khối so với H2 là 11,5. CTPT của hidrocacbon mạch hở đó