单项选择题
Which of the following is NOT a medical problem ancient Egyptians used to have
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A. Dental decay.
B. Tooth erosion.
C. Malignant tumors.
D. Insomnia.
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单项选择题
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单项选择题
Over the past ten years, the sharp increase in the sale of personal computers was due to
A. better computer graphics and sound.
B. the enhanced version of the Pentium processor.
C. the success of the world’s first microprocessor.
D. successful sales of Intel chips and Microsoft software.
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