huong dan giai bai tap tieng anh lop 12

... xenlulozơ + Thủy phân saccarozơ: H ,t C12 H 22O11 + H 2O  C6 H12O6 + C6 H12O6 → Glucozơ + Thủy phân tinh bột: fructozơ H ,t (C6 H10O5 ) n + nH 2O  nC6 H12O6 → Tinh bột glucozơ + Thủy phân ... (C6 H10O5 ) n + nH 2O  nC6 H12O6 → Xenlulozơ glucozơ a Thủy phân saccarozơ, tinh bột xenlulozơ + Thủy phân saccarozơ: H ,t C12 H 22O11 + H 2O  C6 H12O6 + C6 H12O6 → Glucozơ + Thủy phân tinh ... ]n + 3nHNO3  [C6 H 7O2 (ONO2 ) ]n + 3nH 2O → nC12 H 22O11 = Số mol saccarozơ 100 ( mol ) 342 xt ,t C12 H 22 O11 + H 2O  C6 H12O6 + C6 H12O6 → Saccarozơ glucozơ fructozơ t C5 H11O5CHO +...

Ngày tải lên: 22/07/2014, 14:14

Ngày tải lên: 01/04/2014, 04:45

Ngày tải lên: 03/07/2014, 21:52

Ngày tải lên: 26/04/2015, 06:30

... to dance They used to take me to a dancing club where I would listen to the music and watch them danceoccasionally my stepmother, Mary, invited me to dance I also met my wife, Charlotte, in a dancing ... Laura in my arms, and dance her around the room! Our family danced a lot My daughters, Laura and Anne, and I continued to dance on every occasion One favorite memory I have of dancing with Laura ... also d is also calling 49 a educate b educative c educator d education 50 a develop b to develop c developed d developing TEST Choose the word which is stressed differently from the rest a expression...

Ngày tải lên: 07/08/2015, 14:42

Ngày tải lên: 18/10/2013, 00:15

... 12 As for me, I consider reading important part of life a an / Ø b the / a c Ø / the d ... books, or only our favorite newspapers every morning, or only one magazine for which we have developed a preference And the trouble starts here You should neither read only for entertainment nor ... programming, perhaps as a babysitter More than two hours of TV time per day are now a part of children development, generating physiological and mental problems that are of growing concern among experts...

Ngày tải lên: 24/10/2013, 18:15

... species is a population of an organism which is at risk of becoming extinct a dangerous b endanger c endangered d endangerment 58 Only a few of the many species at risk of extinction actually make ... of endangerment Pollution has seriously done harm (50) _ number of terrestrial species, although species living in freshwater and marine ecosystems are also suffering 41 a development b endangerment ... of endangerment Pollution has seriously done harm (50) _ number of terrestrial species, although species living in freshwater and marine ecosystems are also suffering 91 a development b endangerment...

Ngày tải lên: 22/06/2014, 11:56

... see) her for a long time A: I (not can) remember when I last (see) her 12 11 My brother (join) the army when he (be) young 12 Mr Jackson (paint) his house since last month 13 Columbus (discover) ... people drive _ than younger people? a slow b slower c more slow d more slowly They all dance well, but John dances _ a better b more good c the better d the best Your computer is more expensive ... letter I (need) _ to know how many stamps to put on it 18 A: I (think) _ this road is really dangerous Look how fast that lorry (go) _ B: I (agree) _ People shouldn’t go so fast 19 A:...

Ngày tải lên: 04/08/2014, 22:31

... gentle / impolite Probably the most common ways of attracting someone’s attention is by _ A dancing B singing C yelling D waving We might raise our hand and wave to our friend as a _ that ... person or thing you want your friend to look at A take notice of B mention to C look at D point at 12 In most situations, pointing at someone is usually considered to be _ A polite B impolite ... schoolya rd A B C D 11 You should say “You’re welcome!” when someone says “Sorry!” to you A B C D 12 People can use different forms of communication; for examination, verbal and nonverbal forms...

Ngày tải lên: 05/08/2014, 11:20

... make up of method methodically thuộc phương pháp methodical cư xử tốt well-behaved struggle đấu tranh to struggle statistic statistically môn thống kê statistics disruption disruptively to disrupt ... starts D departs / starts In England, each term _ by a one-week break called half term 7 10 11 12 13 14 15 16 17 18 19 20 A divides B educates C puts into force D is separated An academic year ... Vietnamese students have to study more _ than those of twenty years ago to keep pace with the developments of modern society A substitute B subjects C subways D subjunctives The _ year in Vietnam...

Ngày tải lên: 05/08/2014, 11:20

... _ change planes A could not have to B will not have to C had not had to D would not to have to 12 _ here, he would help us with these troubles A Were Peter B If were Peter C Unless were Peter...

Ngày tải lên: 05/08/2014, 11:21

... ask for help 123 He was dismissed because of his laziness A employed B sacked C offered D appointed 124 Marilyn Monroe was very in 1960s A fame B famous C famously D famousness 125 That car ... D hoping to improving 121 She likes meeting people and travelling so she wants to apply for a _ of a receptionist or tourist guide A location B position C site D word 122 There was no one ... surprise B surprised C surprising D surprisingly 126 Most of teenagers are ill-prepared for A employer B employment C unemployed D employee 127 Passing the exam with high grade was beyond...

Ngày tải lên: 05/08/2014, 11:21

... economy was and was dominated by traditional agriculture A over-developing B super-developing C out-developed D underdeveloped 16 Before “Đổi Mới”, our country was and the people led a ... years, we have seen the significant in the economy of our country A develop B developments C developers D developed 34 Henry was a studious student He needed no to work hard A encourage ... renovation B economy C inflation D development 10 A strike in the mining industry is threatening to bring about a shortage of coal in the near future A redundant B ruin C storage D lack 11 The Vietnamese...

Ngày tải lên: 05/08/2014, 11:21

... hard _ tienganh hongngu3@gmail com DĐ: 0916829468 Trang GV: Huỳnh Quang Minh Tuấn BÀI TẬP TIẾNG ANH LỚP 12CTC 39 He is very rich, but he isn’t very happy ... WRITING _ tienganh hongngu3@gmail com DĐ: 0916829468 Trang GV: Huỳnh Quang Minh Tuấn BÀI TẬP TIẾNG ANH LỚP 12CTC John applied for the job even though he has ... is the most important measure to be taken to promote the development of a country A Economical => economic B measure C be taken D development Some people think Harry succeeded in business in spite...

Ngày tải lên: 05/08/2014, 11:21

... closest friend We are always willing to _feelings to each other A tear B cut C share D shake 12 My family is the base from which we can go into the world with _ A confide B confidence C...

Ngày tải lên: 05/08/2014, 11:21

Ngày tải lên: 07/08/2014, 04:21