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- 1学校会议室长15米,宽8米,若要给会议室铺长4分米的地砖,一共要用多少快?
- 2已知:数列{an}满足a1=16,an+1-an=2n,则ann的最小值为( ) A.8 B.7 C.6 D.5
- 3如图,在平行四边形ABCD中,AC、BD相交于点O,AC=6,BD=8,∠AOD=65°,点E在BO上,AF平行CE交BD于点F.
- 4如图所示,要使图中平面展开图按虚线折叠成正方体后,相对面上两个数之积为24,则x-2y=_.
- 5将滑动变阻器的两个接线柱接入电路. 有几种接法?
- 6___ I understand what you said about the building of the bridge ,I can't quite agree with you about the building plan.
- 7氢氧化镁完全沉淀的PH
- 8i think this question easy to answer.是不是正确?
- 9是热空气还是冷空气导致热气球上升?
- 10我们应该努力工作使生活更美好.We should work hard to _______ our life _______.