摘要：
AreaDescriptionBeing well known for its highly innovative products, Merck would definitely be a good target for industrial espionage. To protect its b... 阅读全文
摘要：
一 几何公式三角形: 1. 半周长 P=(a+b+c)/2 2. 面积 S=aHa/2=absin(C)/2=sqrt(P(P-a)(P-b)(P-c)) 3. 中线 Ma=sqrt(2(b^2+c^2)-a^2)/2=sqrt(b^2+c^2+2bccos(A))/2 4. 角平分线 Ta... 阅读全文