1 doesn't work because the light is broken (if you can't even press it)

2 open, because the single pair is not open (this is a normal answer, the teacher should recognize this pair)

I don't know, because she is a senior one, Xiaohong is also a senior one, and because Xiaohong is a girl, her strength will be less, so I don't know if there will be anything that hasn't been crushed (close to life) within 27 times.

Ask for adoption! ! ! ! !