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  3. The ancient Chinese called jade the stone of immortality. It has been used as adornment by women for thousands of years. Cut

The ancient Chinese called jade the stone of immortality. It has been used as adornment by women for thousands of years. Cut

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问题     The ancient Chinese called jade the stone of immortality. It has been used as adornment by women for thousands of years.
    Cutting and polishing the raw stone is a tedious process. It often takes months. After initial cutting, a piece is ground to its desired form—being passed from rough to smooth grindstones. "Our job is to subtract; we cannot add," smiles an experienced carver.
    In judging jade, a little knowledge is often a dangerous thing. It is the easiest gem to imitate. Some of the cheap natural jade can be dyed to a beautiful green. Cruder imitations are made of glass or plastic; but these are easier to detect, since they are smoother than the real gem, which has a slightly uneven surface and a rather greasy look.
    No two gems are alike. Jade is priced according to its colour and translucence(半透明的). Prices range from a few dollars for an opaque(不透明的), dull-green stone to thousands for one with a true, clear, emerald green. The guidelines for buying jade are few and simple; Buy jade only after having seen it under natural light. Use another piece of good quality for comparison. Beware on unusually low prices. Finally, go to only reputable jewelers.
Before being passed through grindstones, raw jade is first______.
选项 A、carved
B、subtracted
C、cut
D、polished
答案B
解析
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