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- 3影响内能的因素有那些?
- 4已知等比数列{an}中,a1+a2+a3=18,a2+a3+a4=-9,求a1+a2+a3+a4+a5
- 5____ haste,the less speed” is good advice he often gives us.A.More B.The more C.The morer D.
- 6含盐率为20%的盐水150克,含盐多少克?
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- 8You've left the light on.
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