将0.38×55×107的结果用科学记数法表示,其正确的是 [ ] A.20.9 发布时间:2017-05-11 16:30 │ 来源:www.tikuol.com 题型:选择题 问题: 将0.38×55×107的结果用科学记数法表示,其正确的是 [ ]A.20.9×107B.2.09×109C.2.09×108D.2.09×1011
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