问题
选择题
2012年国庆期间约有5450000人次在西安旅游，5450000用科学数法表示为（ ）
A．5.45×102
B．5.45×104
C．5.45×106
D．5.45×107
答案
将5450000用科学记数法表示为：5.45×106．
故选：C．
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2012年国庆期间约有5450000人次在西安旅游，5450000用科学数法表示为（ ）
A．5.45×102
B．5.45×104
C．5.45×106
D．5.45×107
将5450000用科学记数法表示为：5.45×106．
故选：C．
| 完形填空。 | |||
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