初中八年级上册物理视频

证明:

三角形中，根据正弦定理:

a/sinA=b/sinB=c/sinC

设a与b不等，

a/b=sinA/sinB不等于1

sinA，sinB不相等

角A，B不等。

得证。

。。你买书就有送的啊

去网站查应该有视频

淘宝上有卖的

I watched “Gone with the Wind” during my winter school ***.It’s an old classic movie and I like it very much.I especially Scarlett O’Hara,a strong willed Southern girl,who,when facing the total destruction of her family’s plantation by the Yankee troops and the cold feel from her husband Rhett Butler,showed her strong will that she will survive,and will not go hungry for another day.Because “after all,tomorrow is another day!”

视屏没有书就有

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