etylen - 2009

... dd Brom etylen C 2 H 5 OH và H 2 SO 4 đđ Hiện tượng : dung dòch brôm bò mất màu Giải thích : H H H H Br Br CH 2 CH 2 + Br BrCH 2 CH 2 Br Br C C = H H H H Br Br -+ C C - H H H H Br - Br - PTHH ... C = H H H H Br Br -+ C C - H H H H Br - Br - PTHH Thu gọn CH 2 = CH 2 + Br 2 Br-CH→ 2 –CH 2 –Br ( Etylen ) (1, 2- diBromEtan ) Quan sát PƯ trên, em có thấy PƯ này...

Ngày tải lên: 20/07/2013, 01:27

... programmers to take ten-minute breaks every two hours, no matter -- -- - -- busy they are. (A) where (B) how (C) if (D) so 105. Prior to getting off the plane, please -- -- - -- the in-flight service questionnaire ... Manila branch moved offices -- -- - -- after months of preparation and planning. (A) ease (B) eased (C) easy (D) easily 110. Plastics Inc. signed a five-year -- -...

Ngày tải lên: 08/08/2012, 18:05

... homeowners to apply paint more -- -- - -- on difficult-to-reach places. (A) evens (B) evened (C) evenly (D) evenness 122. The chefs at Eatery 121 were -- -- - -- to be rated the top restaurant ... skills, Daniel has shown -- -- - -- to be a competent public relations officer. (A) he (B) his (C) him (D) himself 131. The Board of Directors had decided to -- -- - -- a company-wid...

Ngày tải lên: 08/08/2012, 18:06

... given one week vacation. (A) Had (B) Having (C) To have (D) Having been 138. When -- -- - -- a merger deal, you should thoroughly consult your company's lawyer. (A) discussing ... spite (B) in that (C) Although (D) Regardless [2009 3월] 해커스토익 Lynn한 선생님 예상문제 www.Hackers.co.kr Questions 14 1-1 43 refer to the following letter. Dear Amanda brooks Because ... in this mat...

Ngày tải lên: 08/08/2012, 18:06

... (D) technique [2009 4월] 해커스토익 Lynn 선생님 예상문제 www.Hackers.co.kr127. Implementing a new system with suppliers helps manufacturers _______ the risk of over-stocking or running out ... Shipping direct from China to major destinations (Europe, US, Australia, etc.) _______ takes only 3-to-10 days. (A) cooperatively (B) typically (C) recently (D) measurably 129. You may submit ... (A)...

Ngày tải lên: 08/08/2012, 18:07

... departmental supervisors will be held -- -- - -- the conference room. (A) on (B) of (C) as (D) in107. For the people -- -- - -- were affected by the earthquake, the non-profit organization has asked ... shop specializes in cookies made of chocolate, but -- -- - -- are available. (A) other (B) the other (C) another (D) others105. -- -- - -- the replacement parts are delivered b...

Ngày tải lên: 15/08/2012, 10:58

... address or on my office line at 34 0-2 222.146. (A) not(B) do not(C) no(D) noneWarm regards,JackieJackie Morris, Sales Manager Questions 14 7-1 49 refer to the following e-mail.Dear Mrs. Waters,I am writing ... client information.(A) sensitive (B) courteous (C) affordable (D) competitive131. The on- campus stationery is entirely run by students under the _______ of a few faculty members.(...

Ngày tải lên: 15/08/2012, 10:58

... to -- -- - top-quality service and a comfortable environment for their guests.(A) provision (B) provided (C) providing (D) provider 42. The food division is considering -- -- - a new ... and -- -- - to exercise care when leaving e-mail messages within the company.(A) required (B) have required (C) require (D) requiring 51. The new facilities are both more -- -- - and ... promotion...

Ngày tải lên: 15/08/2012, 10:58

... participants' requests; however, seating -- -- - will be made on a first-come, first-served basis. (A) arrange (B) arrangements(C) arranging (D) arranged 130. Cancun, -- -- - for its beautiful, tranquilizing ... desk easily -- -- - following step-by-step instructions. (A) from (B) by(C) with (D) at134. They changed the campaign slogan when surveys of voting women revealed a stro...

Ngày tải lên: 15/08/2012, 10:58

... phased out(c) pushed back(d) pulled out103. The meeting room in the Johnson hotel features state-of-the-art _______ not offered at any other downtown conference facility. (a) technological(b) ... Luke GastonSubject: MEMO - Late Hours PolicyWe have had some problems recently with security issues on evenings and weekends. Many employees are working overtime on end-of-fiscal year projects an...

Ngày tải lên: 15/08/2012, 10:59