Origin symmetry: f(x) and -f(-x) images are symmetrical about the origin.
There is another explanation.
Flip the y = 2-x image along the y axis to get y = 2-x.
Then flip the image on the x axis to get Y =-2-X 2-x.
The obtained image and the original image are symmetrical about the origin.
Option d
The second question, draw an image of y=sinx to judge (this will not be hopeless)
Choose B.
The third question, in fact, this is a random sampling model, which directly extracts two quarters, and everyone is selected with a probability of 1/2.
Choose B.
Of course, classical probability can also be used.
A * * * has c (4,2) = 6 selection methods.
Three of them (ethylene propylene, ethylene butyl, ethylene butyl) are not drawn.
The probability is 3/6= 1/2.
Pure hands, hope to adopt, thank you.