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Loga3011
2 năm trước
Tìm Max `D = -8x^2 + 4xy - y^2 + 3`
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Good friendship should base on ____ understanding. A. mutual                            B. selfish                            C. suspicious                D. changeable 2. My friend always helped me out of difficulties. He is very _______. A. hospitable                      B. good-looking                     C. well-dressed          D. helpful 3. Most of the undeveloped countries need a lot of ________ aid. A. together                          B. unselfish                            C. mutual                                 D. friend 4.  He is too ______ to lend me his bicycle. A. selfish                            B. enthusiastic             C. helpful                           D. pleasant 5.  Suddenly she recognized the ______ of the situation that made her laugh. A. wonder                           B. pleasure               C. understanding                      D. hunour 6.  If you want to get a good result in every work, you should have a _____. A. loyalty                            B. sympathy                       C. constancy                D. unselfishness 7. A ______ friendship is a precious relationship. A. mutual                            B. sincere                           C. generous                     D. successful 8.  The children seem to be totally _________ of working quietly by themselves. A. unhelpful                        B. possible                        C. incapable                           D. loyal 9. My brother has ________________ a new interest with enthusiasm.   A. brought up                     B. looked after           C. taken after                      D. taken up 10. Claire has a wide circle of friends and ________________ .           A. neighborhood                 B. acquaintances            C. friendship                      D. relations 11. A person who is concerned only _______ his own interests cannot be a true friend. A. in                                   B. with                               C. for                                  D. about 12. The weather is very ________________ , so you should take an umbrella with you. A. incapable             B. mutual                     C. changeable                          D. unbelievable 13. Can I count on your _______________ to my company? A. trust                               B. caring                  C. understanding                     D. loyalty 14. I can’t stand people with no ________________ of humor.          A. ability                            B. spirit                              C. keenness                                D. sense 15. The local people are very ________________ to strangers.  A. comfortable                    B. hospitable                      C. enjoyable                 D. interested

11.There is a lot of housework _______.           A. do  B. to do           C. to doing    D. doing 12. My mother has some shopping ________. A. do             B. doing           C. does          D. to do 13. You have too much _________ about.    A. talks         B. talking           C. talked       D. to talk 14. You must ______ to bed early.      A. go             B. went           C. goes          D. to go 15. It is too cold ______ out.     A. go             B. to go           C. going        D. to going 16.I hear them _______ in the next room.          A. to talk       B. talking           C. talk           D. talked 17. They let him ________ a letter to his wife. A. write                    B. to writing                     C. to write   D. writing 18.He seems ________ a doctor.          A. is              B. be             C. to be       D. are 19.The film makes me ______.         A. crying       B. cry            C. to cry        D. to crying 20.She wants ________ for a picnic. A. go             B. to go           C. goes          D. going 21. We will ______ a party next week.   A. have                    B. has                C. to have           D. had 22. It’s lovely ___________ you again.`           A. see            B. seeing           C. to see        D. saw     23. Would you like _______ to the cinema.           A. to go                    B. to going  C. go                        D. goes 24. We have to ________ out today.      A. to eat        B. eating           C. eat            D. eats 25. I felt the animal _____ toward me.    A. to move               B. move  C. moves       D. moving

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