江苏省危险化学品登记:破译密码 a=1;b=2;c=3;...... 9,20,9,19,19,21,13,13,5,18
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it is summer
it is summer
It is summer .
it is summer
傻的类
t is summer
傻的类
破译密码 a=1;b=2;c=3;...... 9,20,9,19,19,21,13,13,5,18
b/(a+b)=(a+c+-b)/(b+c-a)=(a+b+c)/(2a+b+2c)求a:b:c=
已知△ABC中,A:B:C=1:2:3,那么a:b:c=?
(a+b+c)×(a+b+c)=?
若a:b=2:3 b:c=1:2 且a+b+c=33求a.b.c分别是多少?
(a+b+c)^2=?
(a+b)/c=(a+c)/b=(b+c)/a =2(a+b+c)/
求证:3(a+c)(a+b)(b+c)+a^3+b^3+c^3=(a+b+c)^3
已知:(a+b+c)^2=3(a^2+b^2+c^2),求证:a=b=c
a=1,b=0,c=1 !b||++a&&++c 求a,b,c