已知函数y＝ax²＋bx＋c的图象如图所示，则的值为(　　)

假设黄赤交角变为0°，则不可能出现的是（　　）

    Hunter and Sally went down the street with their mother. They could buy a pet today. “I cannot wait to see the pets!”Sally said. She wanted a cat. Hunter wanted a frog or a snake.
    They went into the pet shop. “Look! That rabbit made a hole to hide in,” Sally said. “Look at those two cats,” said Hunter. Their cage was on the floor. The small and brown cats were asleep on each other.
    Sally leaned over the cage. She wanted a better look. The gold necklace she had around her neck came loose. It fell into the cage. It woke up the cats. “Oh no!” Sally cried. “I lost my necklace! It is in the cage!” Then the shopkeeper came. He opened the cage, and took out the necklace. At last, they bought two cats and took them home.

某人右侧下肢因受外伤造成运动障碍，但有感觉。该病人受损伤的部位可能是在反射弧的(     )
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