把长方形按2:1放大,放大后的面积与原来的面积比是请选择DCBA0q.t3B/g+Z:G9Y)C3W/^,S)E8X
A. 2:1:G9Y)C3W/^,S)E8X
B. 1:2:G9Y)C3W/^,S)E8X
C. 4:1:G9Y)C3W/^,S)E8X
D. 1:4:G9Y)C3W/^,S)E8X