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13A.Tìm cấc số tự nhiên x sao cho : a) x B (12) và 24 < x <80; b) x 13; 10< x <70; c) x Ư (48); x > 8; d) 35 x ; x ≤ 10; e) x BC (5,10,15); x < 100; f) x ƯC (20,30,40); x > 2. 13B. Tìm các Số tự nhiên x, sao cho: a) x B(15); 20 < x < 80; b) x 12; 10 < x < 64; c) x Ư (42); x > 4; d) 34 x; x 6; e) x BC (3,5,6); x < 80; f) x ƯC (12,16,20); x > 1. giúp em ạ!

TEST I: điền từ transmission growth developed energy popular basic possible improved practical regular The development of television Television was not really invented. Many scientists invented or (1) __________ parts of the systems that have become the television systems we know now. Radio, of course, was necessary before television could be (2) __________ , because the television uses the same principles of electromagnetic waves that radio does. As soon as radio became possible, the possibility of television(3) _________ was also known, but it took many years for it to become (4) ____________ . British and American scientists helped to develop the (5) ___________ ideas that made television (6) ___________ , but it was a Russian who made th first practical television system. By 1923, Vladimir Zworykin , a Russian, had invented a camera tub that could turn pictures into electric (7) ___________ . By 1929, Zworykin had built a television system that work. By 1935, (8) ____________ television broadcasts were begun in Germany. the first broadcasts in the United States began in 1939, but television did not really become (9) ___________ until later the Second World War. Between 1945 and 1955 there were rapid (10) ___________ in the practical use of television.

A (x) = 2x^4 + 5x^3 - x^2 + 2x +2 B(x)=-x^4 - 5x^3 + 3x^2 - 2x + 1 x= (-1) có là nghiệm của đa thức ko?

1.Tommy asks his teacher ____________ . a. where is New York b. where was New York c. where New York was d. where New York is 2. Young Lee learned some English when she stayed in America, and last year she_____ herself Spanish. A. kept up with B. kept on studying C. went on to teach D. looked up to 3. .…………oil is an irreplaceable natural resource, we must do whatever we can to conserve it. A. Although B. Since C. Because of D. Despite TRẢ LỜI + GIẢI THÍCH RÕ RÀNG, TKSS

phần tiếp đây ạ ko giải thích = report 13.the school yard was………………… with students. a. crowd b. crowds c. crowded d. crowding 14. these are new born…………………..of our farm. a. calf b. calves c. calfes d. calfs 15. my father always drives…………………….. he is a …………………. driver. a. carefully – careful b. carefully – carefully c. carefully – care d. careful – carefully 16. unless you work hard, you……….. fail the exams. a. won’t fail b. will fail c. don’t fail d. didn’t fail 17. mr minh used to …………..alot when he was young. a. smoke b. smoking c. smoked d.be smoking 18. minh drew that picture…………. . no one helped him . a. himself b. heself c. hisself d. minh’s self 19. why are you turning on the tv ? i ………..the news. a. will watch b. am going to watch c. watch d. watched 20. hung is …………. to ride motobike to school. a. not old enough b. old not enough c. enough old not d. enough not old

Mọi người ơi giúp mình bài 7 với ạ Mình đang cần gấppp

Vẽ mầm/ anime NL : Tuổi tác với chị không quan trọng, vấn đề là em đã có bằng lái chưa? ><

Use word(s) given to build the complete sentence. 1,He/ So / frightened / he / be / not speak / long time. ...................................................................................................................................................... 2,man / come / see / me / last night / be / policeman. ....................................................................................................................................................... 3,he / not bear / live/hímelf. ....................................................................................................................................................... 4,By / next / September / she / learn / piano / 3 years. ....................................................................................................................................................... 5,Please / pay / attention / what / I / say. ....................................................................................................................................................... 6,He / astonished / hear / get / job. ....................................................................................................................................................... 7, He / manage / climb / mountain. .......................................................................................................................................................

ko giải thích = report 1. after a month, hoa got used to ………………. in her new school. a. study b. studying c. studied d. is studying 2. she told me ……… up too late. a. don’t stay b. not to stay c. not stay d. to not stay 3. her son was absent from school …………… of his illness last tuesday a. because b. instead c. though d. but 4. that child ……… to go at once . a. will b had better c. has d. have 5. the front yard is …………. to play soccer in. a. small too b. so small c. too small d. very small 6. my brother feels …………… again after his operation. a. strongly b. strength c. strong d. enough strong 7. he doesn’t enjoy …………… basketball a. to play b. plays c. played d. playing 8. this form must have the ……………. of the writer. a. to sign b. signature c. signing d. sign. 9. jane and jack stood in front of the mirror and looked at …………………… . a. herself b. himself c.theirselves d. themselves 10. susan is the ……………………… of the three girls. a. prettier b. prettiest c. pretty d. prettily 11. ………………….the beginning of the day called morning or evening? a. is b. are c. does d.can 12. nam ………………. familiar with getting up early in winter two years ago. a. was b. were c. is d. has been