A:顺序结构
B:选择结构
C:循环结构
D:以上都用
如果5x3m﹣2n﹣2yn﹣m+11=0是二元一次方程,则2m﹣n=____
The lake near our village is _______. It's dangerous to swim in it.
f(x)= {log12(x+1),x∈0,1)1−|x−3|,x∈1,+∞) ,
则关于x的函数F(x)=f(x)﹣a(0<a<1)的所有零点之和为( )