cho 7,28 gam kim loại X có hóa trị không thay đổi tác dụng với dd HNO3 2M loãng, thu đc 0,6272 lít N2O(đktc). Tìm KL X và tính thể tích dd HNO3 đã dùng cứu với em ko biết làm

chứng minh hàm số sau là hàm số bậc nhất với mọi giá trị của tham số m y= (|m-1|+5)x -2

Cho AOB=150 độ . Vẽ trong góc này tia Om và On sao cho Om vuông góc với Oa và On vuông góc với OB a, Chứng tỏ aOn = Bom b, Tính góc mOn

Bài 1: Chia dạng đúng của từ trong ngoặc 1. We (not see)......................Nga since Monday. 2. Lan (be).....................in the USA for 2 years. 3. I (go) .................to bed at 11 o’clock last night. 4. They (move).......................to London in 2003. 5. They (live)..................in HCM city since January. 6. That’s a very old bike. He (have)......................it for a long time. 7. I (buy)...................the motorbike 5 years ago. 8. Peter (be) ................ill for a week. 9. Hoa (visit) ..................her parents once a year. 10. What ...........you (do) ............on your birthday? 11. Hoa and Linh often (play).......................badminton after class. 12. Many people in the countryside still (work) ...................seven days a week. 13. She (come) ................ to France 2 years ago. 14. I (just send) .................... a letter. 15. He (work) .....................for that company for 5 years. Bài 2: Cho dạng đúng của từ trong ngoặc 1. She (not drink) ........... coffee. She (drink) ..........milk. 2. It (be) ...............often hot in the summer. 3. What you (do) ........................... every morning? 4. The earth (circle) .............the sun once every 365 days. 5. I (see) ............. her very often. 6. Vegetarians (not eat) ...................................... meat. 7. Bees (make) ................. honey. 8. Rice (not grow) .................. in cold climates. Bài 3. Chia động từ trong ngoặc 1. Bad driving (cause) ............... many accidents. 2. Mai and Lan (see) ....................... a movie tonight. 3. Mozart (wite) ................. more than 600 pieces of music. 4. "How you (learn) ....................... to drive?" - " My father (teach) ................. me." 5. We usually (go) .... to the library three times a week, but last week we (go) .......twice 6. Alexander (introduce) .............. the telephone in 1876. 7. Yesterday I (be) .........busy, so I (not have) ............ time to phone you. 8. Would you like (come) ............. to dinner tomrrow? Bài 4: Supply the correct form or tense of the verbs in breakets. 1. Lisa (not go) ................to work yesterday. She wasn't feeling well. 2. It (not rain) ......................very much in summer. 3. Most people (learn) ................to swim when they are child. 4. Listen to those people. What language they (talk) ............................. ? 5. The moon (go) ......... round the earth in about 27 days. 6. That bag looks heavy. I (help) .............. you with it? 7. It's her birthday. She (have) ....................... a mealk with her friends. 8. The letter (come) ........................ a few days ago. Bài 5: Supply the correct form or tense of the verbs in brackets. 1. Lan's teacher wants her(spend) ................... more time on Math. 2. I promise I (try) .................... my best next semester. 3. Linh needs (improve) .......................... her English writing. 4. They didn't try (learn) .................. all new words they (come) ................. across. 5. You should (underline) ................the words you want (learn) ........... . 6. Can you help me (move) ................................. this table? 7. Minh always (get) ...... grade A for Physics, but last semester he (get) ........ B. So Minh's teacher asked him (study) ........................ harder this semester. 8. They were proud of (be) .................. so successful. 9. He asked me (not wait) ......................... for him. 10. You should (practice) ................. your English moer often. Bài 6: Supply the correct form of the verbs in brackets 1. Stop (argue) .................... and start (work) .................... 2. I like (think) ............. carefully about things before (make) .................. a decision. 3. Ask him (come) .............. in. Don't keep him (stand) .............. at the door. 4. Don't forget (look) ............... the door before (go) ................. to bed. 5. Did you succeed in (solve) ...........the problem? Let me (suggest) ................ some solutions. 6. Does your jacket need (wash) .............................? - No. But you need(iron) ...........it. 7. I prefer (walk) .....................to (ride) ...................... . 8. Don't try (persuade) ................ ..me. Nothing can make me (change) .............my mind. 9. It was a really good holiday. I really enjoyed (be) ..................... by the sea again. 10. I don't mind (walk) .........................home, but I'd rather (get) ...................a taxi.

cho tam giác abc vuông tại a có ab<ac. trên ac lấy d sao cho ad=ab. trên tia đối của ab lấy e sao cho ae=ac: CMR a, DE=BC b, DE||BC c, biết 4B=5C. tính AED

Anh (chị) hãy chia sẻ ngắn gọn những việc bản thân cần phải làm để nâng cao chất lượng, hiệu quả trong dạy học môn Tiếng Việt và tổ chức bồi dưỡng học sinh giỏi Tiếng Việt ở Tiểu học. *

Giải giúp mình bài này Robert and Catherine have been married for 4 years ->It's 4 years

ommy Brown ________ (like) making up stories. No one ______ (believe) tin tưởng what he ______ (say) because he always _____ (tell) lies. He ________ (live) in a small village and _______ (work) on a farm just outside the village. One night last week, Tommy ______ (finish) work late. It _________ (be) dark and cold. Suddenly, he _______ (hear) a strange noise, so he _________ (look) up. It __________ (be) a UFO bright flashing lights. The UFO ________ (come down) towards him and he ________ (see) two green men looking him from outside. He ___________ (scream), ___________ (drop) his bag and ______________ (run away). When he ______________ (arrive) in the village, he ______________ (run) into some villagers and ______________(start) telling them about the aliens but they all ______________ (laugh) at him. No one ______________ (believe) Tommy. Mn giúp mk nka

BÀI TẬP THỰC HÀNH GIỚI TỪ CHỈ NƠI CHỐN IN / ON / AT 41. We agreed to meet ____________the airport. 42. There is a lot to see ______________Texas. 43. We met _____________a wedding. 44. Where is he? He's ___________prison. 45. She put my shirts___________ the closet.

7/ Tìm GTNN của biểu thức: a) `A=x^2-8x+10` b) `B=4x^2-12x-5` c) `C=x^2 -x +1/2` Nl: nhanh, chi tiết, đúng nha, (bít làm nhưng lười nghĩ;-;)