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最佳答案:这种计算器可以计算tan、cot、sin、cos;但是∠还是无法计算。或者你找到shift键试一下,看有没有上标?如:%……¥#
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最佳答案:ENIAC 1946年
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最佳答案:Bill Gates was born on 1955.10.28, after graduated from primary shcool, he fasin
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最佳答案:800/(7/6)
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最佳答案:In my opion,when they are in difficulty,we should give them a hand.It is necessa