... (2cosx − 1)(2cosx+ sin x + 3) = Do phương trình 2cosx+ sin x + = vơ nghiệm nên π ⇔ cos x= ⇔ x = ± + k2π, k ∈ ¢ (1) ĐỀ3 0 .25 đ 0 .25 đ 0 .25 đ 0 .25 đ 0 .25 đ 0 .25 đ 0 .25 đ 0 .25 đ 0 .25 đ 0 .25 đ 0 .25 ... (−∞; 2) , (2; + ∞) tục (1) - 0 .25 0 .25 0.5 0 .25 0 .25 0.5 Khi x = f (2) = x − 3x + ( x − 2) ( x − 1) lim f ( x) = lim = lim x 2 x 2 x 2 x 2 x 2 = lim( x − 1) = x 2 ⇒ lim f ( x ) = f (2) = x 2 ⇒ ... x.cos x ) + lim x →0 x2 x2 (1 − cos x + − cos x) + lim x2 + x2 + 0 .25 đ x →0 = (2 sin x + sin 2 x) + lim x2 x →0 = sin x.sin x 2.2 .2 sin x.sin x + lim + lim 91 = + + 12 = x.x 2 x .2 x x →0 x →0 Câu...
... d2 = > k = 2, 25 Vậy cực đại xa S2 đoạn MS2 ứng với k = 3: d1 - d2 = 5,5cm Mặt khác tỉ lệ 10 nên S2M vuông góc với S1S2 nên: d1 ^2 - d2 ^2 = 8 ^2 = 64 > d2 + d1 = 128 /11 d2 = 3,068cm > chọn A 25 ) ... bước sóng ánh sáng nhìn thấy có giới hạn tư 0.38 đến 0 .76 Tại điểm A (M) cách vân sáng trung tâm 4mm có vân sáng? loại xạ A.3 vân sáng 0.38,0. 57, 0 .76 B .2 vân sáng 0.6 o.48 C.3 vân sáng 0.6, 0.48, ... sát 75 ) Một máy phát điện xoay chiều ba pha tạo ba suất điện động Biết Kết sau không A B E3 = 22 0.căn2 C D E2 = 22 0.căn2 ; ==> Theo bài: ==> ==> Đápán D sai suất điện động lệch pha ko vi phạm 76 ...
... /2) ( C ) B q = 25 sin (20 00t - /4)( C ) C q = 25 sin (20 00t - /2) ( C ) D q = 2, 5sin (20 00t - /2) ( C ) Câu 27 : Cho mạch dao động (L, C1 nối tiếp C2) dao động tự với chu kì 2, 4ms, mạch dao ... A q = 2cos (2. 107t)(nC) B q = 2. 10-6 sin (2. 107t)(C) C q = 2. 10-8 cos (2. 107t)(C) D q = 2sin (2. 10 t)(nC) Câu 14: Cho mạch điện hình vẽ Cuộn dây có L = 4.10-3 H, tụ C = 0,1 F, nguồn điện có suất ... bước sóng điện từ có bước sóng = ? sử dụng hai tụ a) C1 // C2 A 72 m B 150 m C 75 m D 25 0m b) C1 nối tiếp C2 A 72 m B 150 m C 75 m D 25 0m Bài Một mạch dao động gồm cuộn cảm tụ C0 = 20 pF mạch bắt bước...
... at D in / on 12) I often stay at home ………… Sunday mornings A in B on C at D by IV- Khoanh tròn lỗi sai số A, B, C D 1) Do your brother go to school by bike or on foot ? A B C D 2) She lives in ... bus C Mr Trung and Mr Nam travel to work by bus D Mr Trung and Mr Nam travel to work by a bus 2) there / a supermarket / my apartment A There is a supermarket next my apartment B There is a ... there many taxi in front of the hotel ? D There is many taxis in front of the hotel ? VI-Chọn câu có nghĩa với câu cho sẵn số A, B, C, D : 1) I often walk to school A I often go to school by foot...
... d.shouldn ,t 176 .My mother always drives a.careful b.carefuly c.carefully d.slow 177 .You ought to the dentist’s a.to go b.go c.going d.went 178 .How is your brother ? _ He’s 1 .70 meters a.high ... interested 76 .Nam’s sister can play ……………guitar d interestedly a a b an c d.the 77 .Tuan always walks the dog and …………… a Nam is ,too b is Nam ,too c.So does Nam d a & c are correct 78 .The doctor ... Youth Theater tonight a.in b.of c.on 122 Are you free Monday? a.to b.at c.on d.from 123 Very few Vietnam people had TV sets 1960s a.in b.at c.on d.from d.from 124 Don’t forget to brush your teeth...
... kẻ yếu.) PHỤ LỤC 2: ÔN TẬP HIỆU QUẢ TRƯỚC CÁC KỲ THI TIẾNGANH Ngay họctiếngAnh trường, bạn cần dành thời gian tự trau dồi vốn tiếngAnh thân Đây nhân tố định trình độ tiếngAnh bạn đạt đến ... họctiếng Anh, ôn tậptiếng Anh, … hay từ khóa liên quan đến họctiếng Anh) - Cố gắng nói chuyện với người khác việc bạn ôn tập Bạn bè người thân gia đình cho bạn lời khuyên giá trị việc ôn tập ... thức sớm để không trễ học. ) C- BÀITẬPTRẮCNGHIỆM Học, học nữa, học măi!!! Trang 11 I- NGỮ ÂM: Chọn từ có phần gạch phát âm khác từ lại 1) A sword B wear C wet D swamp 2) A beam B comb C black...
... BàitậptrắcnghiệmtiếngAnh 12 (Học kỳ II) Nguyễn Đặng Hoàng Duy A As a guest, you should bring gifts to a dinner ... friends out to dinner at the end of your stay D Helping is more important than the gesture Học, học nữa, học mãi!!! Trang ...
... black plastic Page VipLam.Net BàitậptrắcnghiệmTiếngAnh lớp 12 27 If Tan Son Nhat Airport clear of fog we'll land there A is B was C will be D could be 28 Did he tell you ? A where ... stomach-ache D HIV/AIDS 45 How many countries does UNICEF work in? A 23 B 190 C 1 92 Page 44 D 52 VipLam.Net BàitậptrắcnghiệmTiếngAnh lớp 12 Choose the word or phrase (A, B, C, or D) that best fits ... VipLam.Net BàitậptrắcnghiệmTiếngAnh lớp 12 idea 20 There was no one else at the post office I _in a queue A didn't need to wait B mustn't wait C needn't have waited D needn't wait 21 If I...
... new possibilities in farming systems research in Vietnam a risen b opened c renovated d called 37 The introduction of appropriate farming practices to Vietnam farmers can help them achieve a higher ... difficulty, they managed to climb to the top of the mountain a In spite b Despite c But d Although 42 In spite of his hard work, he could not finish the job a As hard as he work b Despite he worked ... bad 46 Julie failed the exam _ of working very hard a despite b in spite c even if d though 47 Tom went to work despite _ a that he did not feel very well b of the fact not feeling well...
... Phï Cõ High School tiÕng anh 12 Bµi tËp tr¾c nghiÖm 28 You should listen to some kinds of music to have relaxed after a day of hard work a b c d 29 The father told to his son not to ... children represent a 33 percent of households b 20 percent of households Tæ ChÝnh –Ngo¹i Anh Dòng Gi¸o viªn : TrÇn Phï Cõ High School tiÕng anh 12 c percent of households 45 Who generally constitutes ... ethinic, class, anh religious customs among American groups The most recent goverment statistics reveal that only about one third of all current American families fit the tradittional mold anh another...
... What's your new address? a It's the old one b Go straight on c Flat 42B, 22 5 Nathan Road, Kowloon How we get there? a Flat 42B Nathan Road b Yes, you c Turn right just after the Bank of China ... tasks 26 BAI Elizabeth Blackwell was born in England in 1 821 and (1) to New York City when she was ten years old One day she decided that she wanted to become a doctor That was nearly (2) ... got out of bed A B C D All the children have been returned safe to their parents A B CD 12 BAITAPTIENGANH 10 • CODAPAN teeth I have a shower and dry my hair Then I choose my clothes and I...
... b Lesser c Fewer d Few 14 The Duke of Westminster is _in Britain 22 6 BAl TAPTIENGANH 10 • CODAPAN2 27 38 is one of the (2) _famous buildings in London Most of the present building, (3) ... York/ founded/ 1 624 / the Dutch/ called/ New Amsterdam a.NewYcdcwasiburidedml 624 bymeDiitch^ b.New York was founded in 1 624 by the Dutch, who called it New Amsterdam 21 8 BAl TAP TtiSNG ANH 10 • C6 DAP ... Indian food is the nicer than Chinese 22 2 BAl TAPTIENGANH 10 • CODAPAN 10.Jane is older/ elder than I am 11.My elder/ older sister got married last year 12. Emma made the least/ less mistake!...
... at 8.00 pm pm 34 20 participants a 20 participants there are in all b There will be 20 participants there all c There are 20 participants in all d 20 participants are in all 72 B A I T A P TR ... to felt c watched d realized members from other countries 22 BAITAPTRACNGHIEMTIENGANH • • PHAN BAITAP 24 BAITAPTRACNGHIEMTIENGANH 11 11PHAN BAITAP b I was very eager enough to prepare ... looked suspiciously 28 . _ My father usually beer after meals but now he 20 BAITAPTRACNGHIEMTIENGANH 11 • PHAN BAITAP UNIT 2: PERSONAL EXP ERIE'' I ~ 19 29 Wars _the most...
... He could die on March 27 , 1968 in a plane crash b He was able to die on March 27 , 1968 in a plane crash c He died on March 27 , 1968 in a plane crash d He died on March 27 , 1968 for a plane crash ... knowledge. This is especially important for those who intend to spend large amounts for 12, 20 10 to November 27 , 20 10. Guangzhou is also the (41) city in Chin; 29 . the police had rescued from the fire 11 She is a very accomplished pianist stamps to ( 42) ... The Royal National Park is in New South Wales, Australia 32 it / locate / 29 km south / Sydney a. It located 29 km south of Sydney, b. It locating 29 km south of Sydney, c. It is that locates 29 km south of Sydney d. It is located 29 km south of Sydney...