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- 4Write a short passage about one of your past weekends.The following questions may help you.
- 5若25的x次方等于2000,80的y次方等于2000,求x +y-xy的值,
- 6集合A={x|x²-3x+2=0},B={x|x²+2(a+1)x+a²-5=0}
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- 8负一a的2次方b+二分之一a的二次方b等于多少?
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- 10-----I wish I ___the meeting .-----But you didn't .A have attend B had attend