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Question 1 of 5
1. Question
下列哪项是正确的？
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Question 2 of 5
2. Question
若ab=2ab，则 \frac{1}{a} – \frac{1}{b} 的值为_______。
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Question 3 of 5
3. Question
满足 5 \leq 6x18 < 23的整数解有______个。
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Question 4 of 5
4. Question
如图所示，阴影部分的面积为________。
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Question 5 of 5
5. Question
二元一次方程式 \frac{1}{6}x – \frac{4}{5} y= \frac{2}{3} ， 用含x代数式表示y,得______。
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