... made a great impression on the critics It’s high time something were done about the city’s traffic problems by the council Only later did I realise who he was There has been a considerable fall in ... the station? Exercise 4: They had such a fierce dog that nobody would visit them I can barely see any marks on that dress Nothing but a full apology would satisfy him He didn’t forget and neither ... later Only later ………………………………………………………………… The value of sterling has fallen considerably in the past week There has ………………………………………………………………… It won’t make any difference if it rains because...
... By no means is he stupid 87 ‘You don’t appreciate me,’ she complained ‘You take me for granted,’ she complained 88 The man in that painting bears a strong resemblance to my uncle The man in that ... between A and B She can’t tell A from B 82 He is famous for his vast knowledge of the religion He is an authority on the religion 83 That dress has only the slightest mark on it I can barely see any ... don’t have any desire to see him tomorrow 46 It looks like rain to me I think it’s going to rain 47 The people who were there didn’t notice anything unusual No one there notices anything strange...
... politician and the construction contract One runner was so exhausted (that) he couldn’t/was unable to complete the last lap of the race I’ve never known a more warm-hearted person than my mother ... years ago It’s a pity (that) one/we cannot rely on what she says There is no comparison between an open fire and central heating I can scarcely remember anything /a thing about my childhood Key ... as I can see, there is no advantage in further discussion Please make allowance for Jane’s poor typing; she’s only been learning for a month That young man is bound to fail in this test Trontrary...
... politician and the construction contract One runner was so exhausted (that) he couldn’t/was unable to complete the last lap of the race I’ve never known a more warm-hearted person than my mother ... years ago It’s a pity (that) one/we cannot rely on what she says There is no comparison between an open fire and central heating I can scarcely remember anything /a thing about my childhood Key ... as I can see, there is no advantage in further discussion Please make allowance for Jane’s poor typing; she’s only been learning for a month That young man is bound to fail in this test Trontrary...
... politician and the construction contract One runner was so exhausted (that) he couldn’t/was unable to complete the last lap of the race I’ve never known a more warm-hearted person than my mother ... years ago It’s a pity (that) one/we cannot rely on what she says There is no comparison between an open fire and central heating I can scarcely remember anything /a thing about my childhood Key ... as I can see, there is no advantage in further discussion Please make allowance for Jane’s poor typing; she’s only been learning for a month That young man is bound to fail in this test Trontrary...
... economy poses some serious problems and if a company doesn't act fast enough, it can lose, and if the company loses heavily, the employees working for the company and the stores that depend on ... the US and runs the project by using a computer, a high speed Internet connection, and a cellular telephone for quick questions D A global economy poses some serious problems If a company doesn't ... politician and the construction contract One runner was so exhausted (that) he couldn’t/was unable to complete the last lap of the race I’ve never known a more warm-hearted person than my mother...
... cake because it was so hard f If It hadn’t rained, we would have gone g My mother cooks better than me/ I do/ I can/ My mother is a better cook than me/ I am h Do you happen to have change for ... was no answer b Don’t call him (by) that insulting name/ such an insulting name c “Which (one) you want? the blue (one) or the green (one)?” John asked d She thought Rome (was) even worse than Paris ... one) f I haven’t seen that man here before (It’s) g The furniture was so expensive that I didn’t buy it (The furniture was too) h The robbers made the bank manager hand over the money (The bank...
... Trong máy quang ph , bu ng nh n m phía sau lăng kính C Trong máy quang ph , lăng kính có tác d ng phân tích chùm ánh sáng ph c t p song song thành chùm sáng đơn s c song song D Trong máy quang ... t s lan truy n khơng gian c a n t trư ng bi n thi n theo th i gian π B Trong sóng n t , n trư ng t trư ng ln dao đ ng l ch pha C Trong sóng n t , n trư ng t trư ng bi n thi n theo th i gian v ... hi n tư ng quang d n vi c ch t o đèn ng D.Trong hi n tư ng quang d n, lư ng c n thi t đ gi i phóng e- liên k t thành electron d n r t l n 84 ði u sau nói v pin quang n? A Pin quang n m t ngu...
... Vàng D Xanh Câu 4: hợp chất sau thuộc loại đipeptit: A H2N-CH2CONH-CH2CONH-CH2COOH B H2N-CH2CONH-CH(CH3)-COOH C H2N-CH2CH2CONH-CH2CH2COOH D H2N-CH2CH2CONH-CH2COOH Câu 5: tên gọi H2NCH 2CO- NHCHCO-NH-CH-COOH ... nitơ alanin là: A 15,73% B 18,68% C 15,05% D 17,98% Câu 10: hợp chất sau thuộc loại đipeptit: A H2N-CH2CONH-CH2CONH-CH2COOH B H2N-CH2CONH-CH(CH3)-COOH C H2N-CH2CH2CONH-CH2CH2COOH D H2N-CH2CH2CONH-CH2COOH ... hợp hai ancol đồng đẳng Công thức hai este A CH3COOCH3 CH3COOC2H5 B C2H5COOCH3 C2H5COOC2H5 C CH3COOC2H5 CH3COOC3H7 D HCOOCH3 HCOOC2H5 Câu 30:(ĐHB10) Hỗn hợp M gồm axit cacboxylic X, ancol Y (đều...
... gia thi đấu) Construct (xây dựng) Construction Constructive (tích cực, mang tính xây dựng) constructively Continue (tiếp tục) continuation Continuous (tiếp diễn, lien tục) Continuously continually ... Continual (lặp đi, lặp lại thường xuyên) Contribute (đóng góp) Contribution (sự đóng góp) Conserve (bảo tồn) Conservation (sự bảo tồn, bảo quản) Contributor (người đóng góp) Contributory # noncontributory ... electricity, ring off on (mặc, mang vào) have a shirt on, put the shoes on, try a coat onon (tiếp tục) keep on doing something, work on late, hang on/ hold onon (kết nối) turn on/ switch on the light,...
... suất mạch lúc trước sau cos φ1 ; cos φ2 { cos φ2 = sin φ1 ⇒ cos φ2 + cos φ2 = ⇒ cos φ1 = √ Khi ta có 1 cos φ1 = cos φ2 Chọn D Bài toán 33: Đặt điện áp xoay chiều uAB = U0 cos (100πt) V vào hai ... Xác định hệ số công suất mạch ứng với ω1 ω2 A cos φ = 0, 96; cos φ′ = 0, B cos φ = 0, 96; cos φ′ = 0, C cos φ = 0, 96; cos φ′ = 0, 80 D cos φ = 0, 96; cos φ′ = 0, 96 Lời giải Ta có UAM vuông pha ... = r ⇔ R2 = ZI ZC U1 Lại có: cos α1 = UAB ′ U1 cos α1 cos α2 = Lấy = (1) UAB cos α2 π α1 + α2 = ⇒ cos α1 = sin α2 (2) { tgα1 = cos α1 = 0, Lấy (1) + (2) ⇒ ⇒ cos α2 = 0, tgα = 4 UM B r2...
... off the air-conditioner This sentence means: A Do you mind if I turn off the air- conditioner? B Do you have someone turn off the air-conditioner? C Do you have the air-conditioner turn off? ... enough money now, I wouldn"t buy that coat 55.That expression on his face has some meaning A That expression on his face is meaningless B That expression on his face means C That expression on his ... 131 They spent a lot of money on food and clothes A A lot of money was spent on food and clothes B A lot of money were spent on food and clothes C A lot of money on food and clothes were spent...
... 2cos3x cos2 x 2cos4 x cos x (4cos3 x 3cos x)cos2 x (2cos2 x 1)cos x cos x[(4cos2 x 3)cos2 x 2cos2 x 1] cos x{[2(1 cos2 x) 3]cos2 x 2cos 2 x 1} cos x(4cos2 ... 4cos x 0 cos x cos x sin x 2sin x cos2 x cos2 x cos x 2(2cos2 x 1) sin x(1 2cos2 x) cos2 x cos x 2cos2 x sin x cos2x cos2x cos x 2cos2 x cos2 x cos2 ... x cos2 x cos8 x cos2 x cos2 x 4cos2x(cos8 x sin8 x) 5cos2x 4cos2x(cos4 x sin4 x)(cos4 x sin4 x) 5cos2x 4cos2x(cos2 x sin2 x)(cos2 x sin2 x)(cos4 x sin4 x) 5cos2x...
... cụt : 9% đen, dàiCâu 26:Moocgan sử dụng phép lai sau để phát quy luật di truyền liên kết? A Lai phân tích B Lai thuận nghịch C Lai phân tích lai thuận nghịch D Lai tương đương Câu 27:Các gen ... giới xảy hoán vị giới đực không xảy hoán vị Con có kiểu gen đực có kiểu gen xảy hoán vi 14% tao loai giao tử chiếm tỉ lê là: AB = ab = 43%; Ab = aB = 7% Con không xay hoán vị tạo loại giao tử AB=ab ... đen, cánh dài D 75% thân xám cánh ngắn : 25% thân đen cánh dài Lời giải: Trong thí nghiệm Moocgan tiến hành ở ruồi giấm ,lai ruồi giấm thân xám,cánh dài chủng với ruồi thân đen, cánh cụt thu Fi...
... đúng? 17 A X có 17 proton 35 nơtron C X có 17 proton 17 nơtron B X có 17 proton 18 nơtron D X có 18 proton 17 nơtron Ion A2+ cócấu hình electron phân lớp 3p Tổng số electron nguyên tử A là: A ... lợng đợc nguyên tố cacbon D Thi t bị định lợng đợc nguyên tố hiđro 34 Cho hỗn hợp ankan sau: pentan (t os 36oC), hexan (tos 69oC), heptan (tos 98oC), octan (tos 126oC), nonan (tos 151oC) Có thể ... hiđrocacbon mạch hở dãy đồng đẳng thu đợc 11,2 lít khí CO2 (đktc) 9,0g H2O Hai hiđrocacbon thuộc dãy đồng đẳng dãy đồng đẳng sau đây? A Ankan 50 B Anken C Ankin D Aren Một hỗn hợp khí gồm ankan anken...
... = = = ⇒ ϕ = arccos r r 3a 3 AN BD' a uuu uuuu a2 r r uuu r [AN, BD'] = (1;4;3),AB = (a;0;0) = a(1;0;0) uuu uuuu uuu r r r a3 [AN, BD'].AB a = = Do : d (AN, BD') = uuu uuuu r r 26 [AN, BD'] a2 26 ... giả thi t ta tính : B(a;0;a), a a ;0;a) , N(a; ;0) 2 uuu r a a AN = (a; ; −a) = (2;1; −2) 2 uuuu r BD' = (−a;a; −a) = −a(1; −1;1) D(0;a;0) , A(0;0;a) , M( Mặt phẳng (P) qua M song song với AN ... uuuu n = [AN, BD'] = − (1;4;3) a 7a Suy : : (P) :1(x − ) + 4(y − 0) + 3(z − a) = ⇔ x + 4y + 3z − =0 uuu r uuuu r b) 1đ Gọi ϕ góc AN BD' Ta có : 2 + a + a2 uuu uuuu r r −a AN. BD' 3 cos ϕ = uuuu...
... CH3COONa, C2H5OH, CH3CHO B CH2(COONa)2, C2H5OH, CH3CHO C CH2(COONa)2, C2H5OH, C2H5CHO D CH(COONa)3; C2H5OH, C2H5CHO Câu 46 Oxi hóa ancol đơn chức X thu hỗn hợp Y gồm axit, andehit, nước ancol ... gam Hãy đồng đẳng hai hiđrocacbon dãy sau đây: (1) Ankan (2) Anken (3) Ankin (4) Ankien (5) Hiđrôcacbon thơm (6) Xicloankan a b (2,3) c.(3), (4), (5) d (3, 4) Đề ônthi số Đáp số : 1-c 2-c 3-b 4-d ... cần 0.5 mol NaOH, đốt cháy hoàn toàn h.hợp thu 11,2l CO CTPT hai axit là: a CH3COOH (COOH)2 c HCOOH CH2(COOH)2 b.HCOOH (COOH)2 d CH3COOH CH2(COOH)2 Câu 31 CT tổng quát este chức tạo rượu no hai...
... CH3-COOH, CH3-COO-CH3 B (CH3)2CH-OH, H-COO-CH3 C H-COO-CH3, CH3-COOH D CH3-COOH, H-COO-CH3 Câu 17: Cho chất: etyl axetat, anilin, ancol etylic, axit acrylic, phenol, phenylamoniclorua, ancol ... phải A C2H5COOH, C2H5CH2OH, CH3COCH3, C2H5CHO B C2H5COOH, C2H5CHO, C2H5CH2OH, CH3COCH3 C C2H5CHO, CH3COCH3, C2H5CH2OH, C2H5COOH D CH3COCH3, C2H5CHO, C2H5CH2OH, C2H5COOH Câu 21: Ba hợp chất hữu ... Y, Z A CH2(OH)-CH2-CHO, C2H5-COOH, CH3-COO-CH3 B HCOO-C2H5, CH3-CH(OH)-CHO, OHC-CH2-CHO C CH3-COO-CH3, CH3-CH(OH)-CHO, HCOO-C2H5 D HCOO-C2H5, CH3-CH(OH)-CHO, C2H5-COOH Câu 22: X Y hai nguyên tố...