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Q1: Twice the water flow in the hot-water
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Q64: <span class="ql-formula" data-value="\frac { 4 } {
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Q95: <span class="ql-formula" data-value="\left\{ \begin{aligned}4 x + 2
Q106: <span class="ql-formula" data-value="\left\{\begin{array}{l}y=2 x^{3}+10 x^{2}+8 x \\y=-\frac{1}{2}
Q132: <span class="ql-formula" data-value="f ( x ) =
Q167: The sum of a student's three scores
Q233: If an earthquake has an intensity