What causes optical illusion 1?
Câu hỏi: What causes optical illusion 1?
A The red dots aren’t close to each other.
B We can see the blue dots clearly, but not the red dots.
C We compare each red dot with the blue dots around it.
D We can see that the blue dots are larger than the red ones.
Câu hỏi trên thuộc đề trắc nghiệm
Reading 7B: Seeing the Impossible