Expressway's holiday free policy has promoted the development of tourism in Beijing suburbs. It is reported that during the 20 14 7 Spring Festival holiday, the rural folk tourism in our city received

Expressway's holiday free policy has promoted the development of tourism in Beijing suburbs. It is reported that during the 20 14 7 Spring Festival holiday, the rural folk tourism in our city received about 697 0 tourists. C.

Test and analysis: according to the definition of scientific notation, scientific notation is expressed as a× 10 n, where 1 ≤| a | < 10, and n is an integer. It is very important to correctly determine the value of a and the value of n when expressing. When determining the value of n, it depends on whether this number is greater than or equal to 1 or less than 650. When the number is greater than or equal to 1, n is its integer digits minus1; When the number is less than 1, -n is the number of zeros before its first significant number (including 1 zeros before the decimal point). Therefore,

∫697 000 * * 6 digits, ∴ 697 000 = 6.97 × 10 5. So, C.