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Gold used in jewelry is mixed with harder metals to add strength and durability. The metals added can also be used to change gold's color, giving it a for the natural yellow tone of pure gold. Mixtures like these, of less costly metals with more valuable ones, are called alloys. Copper and silver are the most common metals mixed with gold to make yellow gold jewelry. White gold is usually made with an alloy of gold and nickel.The measure of is called gold's purity is called a karat. The higher the karat rating, the higher the amount of pure gold. 24 karat is pure gold,18 karat is 75% pure gold, 14 karat is 58.5% pure gold,and 9 karat is 37.5% pure gold. All other things being equal, the higher the percentage of pure gold used in the alloy, the more valuable and expensive the jewelry will be.Gold jewelry pieces are usually stamped with a marking to identify the karat amount. White gold that is 24K is too soft for jewelry, 18K,14K and 9K gold are all appropriate for jewelry, and they all make pieces that look great and wear beautifully. Question: Which of the following statements best captures the main idea of this passage?
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A. Although gold is very valuable, it is also very expensive
B. Gold jewelry is stamped with its karat weight
C. Gold jewelry is made using alloys
D. Colored gold is more valuable that white gold
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| 6 |
Right now, I am looking at a shelf
full or relics, a collection of has-beens, old-timers, antiques, fossils. Right
now I am lolling at a shelf full of books. Yes that’s right. If you have some
spare cash (the doing rate is about $89) and are looking to enhance your reading
experience, then I highly suggest you consider purchasing an e-reader.
E-readers are replacing the books of old, and I welcome them with open arms (as
you should).
If you haven’t heard of an e-reader
and don’t know what it is, then please permit the following explanation. An
e-reader is a device that allows you to read e-books. An e-book is a
book-length publication in digital form, consisting of text, images, or both,
and produced on, published through, and readable on computers or other
electronic devices. Sometimes the equivalent of a conventional printed book,
e-books can also be born digital. The Oxford Dictionary or English defines the
e-book as “an electronic version of a printed book, “but e-book can and do
exist without any printed equivalent.
So now you know what an e-reader is.
But you still may be wondering why they put printed books to shame. E-readers
are superior to printed books because they save space, are environmentally friendly,
and provide helpful reading tips and tools that printed books do not.
E-readers are superior to printed
books because they save space. The average e-reader can store thousands of
digital book, providing a veritable library at your fingertips. What is more,
being the size and weight of a thin hardback, the e-reader itself is relatively
petite. It is easy to hold and can fit in a pocketbook or briefcase easily. This
makes handling ponderous behemoths such as War and Peace, Anna Karenina, and
Les Miserables a breeze. Perhaps the only drawback to the space-saving aspect
of an e-reader is that it requires you to find new things to put on your
shelves.
In addition, e-readers are superior
to books because they are environmentally friendly. The average novel is about
300 pages long. So, if a novel is printed 1000 times, it will use 300,000
pieces of paper. That’s a lot of paper! If there are about 80,000 pieces of
paper in a tree, this means it takes almost 4 trees to make these 1000 books.
Now, we know that the average bestseller sells about 20,000 copies per week.
That means that it takes over 300 trees each month to sustain this rate. And
for the super bestsellers, these figures increase dramatically. For example,
the Harry Potter book series has sold over 450 million copies. That’s about 2
million trees! Upon viewing these figures, it is not hard to grasp the severe
impact of printed books on the environment. Since e-reader use no trees, they
represent a significant amount of preservation in terms of the environment and
its resources.
Finally, e-reader are superior to
books because they provide helpful reading tips and tolls that printed books do
not. The typical e-reader allows its user to customize letter size, font, and
line spacing. It also allows highlighting and electronic bookmarking.
Furthermore, it grants users the ability to get an overview of a book and then
jump to a specific electronic bookmarking. Furthermore, it grants users the
ability to get an overview of a book and then jump to a specific location based
on that overview. While these are all nice features, perhaps the most helpful
of all is the ability to get dictionary definitions at the touch of a finger.
On even the most basic e-reader, users can conjure instant definitions without
having to hunt through a physical dictionary.
It can be seen that e-readers are
superior to printed books. They save space, are environmentally friendly, and
provide helpful reading tips and tools that printed books do not. So what good
are printed books? Well, they certainly make nice decorations.
Which of the following best
describes the organization of this passage?
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A. Introduction, thesis statement, supporting paragraphs, conclusion
B. History, thesis statement, supporting paragraphs, conclusion
C. Advertisement, background, introduction, supporting paragraphs, example, conclusion
D. Introduction, background, thesis statement, Supporting paragraphs, conclusion
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