用0.1000mol/L NaOH滴定0.1000 mol/L HCl时,pH突跃范围为4.30 ~9.70,若用1.000 mol/L NaOH滴定1.000 mol/L HCl时,pH突跃范围为( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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