(____)A. Orange, orange. Sit down.
(____)B. Black, black. Stand up.
(____)C. White, white. Touch the ground.
(____)D. Brown, brown. Turn around.
(____)E. Red, red. Carry your bag.
英国科学家牛顿是近代自然科学的奠基人之一,他的主要成就不包括( )