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প্রিমিয়াম প্ল্যান: ১ মাস
99 ৳
৩০ দিনের জন্য সকল লাইভ এবং আর্কাইভ মডেল টেস্ট, প্রশ্ন ব্যাংক ও লেকচার শিট সহ অ্যাপ এর প্রিমিয়াম সব এক্সেস পাবেন।

22742 . Read the following passage and answer questions An alloy is a substance that is formed by combining a metal with other metals, or nonmetals. For example, brass is an alloy of the metals copper and zinc, and steel is alloy of the metal iron with the nonmetal carbon. The special characteristics of metals, such as hardness, strength, flexibility, and weight are called its properties. By the process of alloying it is possible to create materials with the exact combinations of properties for particular use. In the aircraft industry, there is a need for metals that are both strong and light. Steel is strong but too heavy, whereas aluminum is light but not strong. By mixing aluminum with copper and other metals, an alloy is created that is strong to withstand the stresses of flight, but light enough to reduce the cost of fuel to lift the aircraft. There is an important difference between the alloys created by us and the combination of metals that occur accidentally as impure metals.. Both are mixtures, but alloys are mixtures that have been deliberately combined in specific proportions for definite purpose. What does the writer say about alloys in the text?

  • A. They are not useful
  • B. They are created from waste products
  • C. They are a combination of metals in specific proportions
  • D. In alloys metals are combined in random proportions
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ঘ ইউনিট ২০২০-২০২১ || ঢাকা বিশ্ববিদ্যালয় || 2020
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ঘ ইউনিট ২০২০-২০২১ || ঢাকা বিশ্ববিদ্যালয় || 2020
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ঘ ইউনিট ২০২০-২০২১ || ঢাকা বিশ্ববিদ্যালয় || 2020
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22748 . Ratul - before I came.

  • A. left
  • B. will leave
  • C. would leave
  • D. had left
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22750 . Rafiq is not _____ for this kind of a job.

  • A. cut in
  • B. cut up
  • C. cut through
  • D. cut out
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22751 . Rad the passage below and choose the alternative A, B, C or D to answer the questions (18-23)  Washington was the first city in history to be created solely for the purpose of governance. Following the Revolution, members of congress had hotly debated the question of a permanent home for themselves and for those departments- the Treasury, the patent Office, and so on - Which even the sketchiest of central governments would feel obliged to establish.  In 1790, largely in order to put an end to congressional bickering, George Washington was charged with selecting a site for the newly designated federal district. Not much to anyone's surprise but to the disappointment of many, he chose a tract of land on the banks of the Potomac River, a few miles upstream from his beloved plantation Mount Vernon. The District  of Columbia was taken in part from Virginia and in part from Maryland. at the time is was laid out, its hundred square miles consisted of gently rolling hills, some under cultivation and the rest heavily wooded, with a number of creeks and much swampy land along the Potomac. There is now a section of Washington that is commonly referred to as Foggy Bottom; that section bore the same nickname a hundred and eighty years ago. two port cities, Alexandria and Georgetown, flourished within sight of the new capital and gave is access by ship to the most important cities of the infant nation- Charleston, Baltimore, Philadelphia, New York, Newport, Salem and Portsmouth- and also to the far- off ports of England and the Continent.    16.Why was George Washington's choice for the site of the - capital not very surprising?  

  • A. George Washington had lived on the site before the American Revolution.
  • B. The river would bring trade to the city.
  • C. The site was very close to George Washington's own home.
  • D. The member of Congress hade already state there preference for the site.
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খ ইউনিট ২০১৭-২০১৮ || ঢাকা বিশ্ববিদ্যালয় || 2017
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22753 . QUESTIONNAIRE

  • A. questionnaire
  • B. questionaire
  • C. questionnairre
  • D. questinnaire
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আন্ডারগ্র্যাজুয়েট প্রোগ্রাম ভর্তি পরীক্ষা || বিজ্ঞান ইউনিট (সাত কলেজ) ২০২২-২৩ || ঢাকা বিশ্ববিদ্যালয় || 2023
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