问题
单项选择题
关于根管系统，说法错误的是（）.
A.管间吻合是相邻根管间的交通支
B.根管侧支是发自根管的细小分支
C.根尖分歧是根管在根尖部发出的细小分支
D.根尖分叉是根管在根尖部发出的细小分支
E.副根管是发自髓室底至根分叉处的管道
答案
参考答案：D
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关于根管系统，说法错误的是（）.
A.管间吻合是相邻根管间的交通支
B.根管侧支是发自根管的细小分支
C.根尖分歧是根管在根尖部发出的细小分支
D.根尖分叉是根管在根尖部发出的细小分支
E.副根管是发自髓室底至根分叉处的管道
参考答案：D
阅读下面短文，从短文后所给各题的四个选项(A、B、C、D)中，选出可以填入空白处的最佳选项。 Once there was a poor little girl living near a forest. She had no family and no one to love her. So she often sad and lonely. One day, when she was walking in the forest, she found that a small was trapped unluckily in a bush. The butterfly tried to fly away failed. The kind little girl saved the butterfly with great care. Instead of flying away, the butterfly turned into a beautiful fairy (仙女). The little girl was very . “Thank you for me. You are so kind. I will make any of your dreams come true.” said the fairy. The little girl thought for a moment and then said, “I want to be !” The fairy said, “Very well. I will help you.” And she said something in the little girl’s ear. Then the fairy disappeared. As the kind little girl grew up, she was always ready to help people in need and was popular among the villagers. No one in the village was as happy as she was. Everyone asked her the of ther happiness. She always smiled and answered, “The secret of my happiness is that I listened to a kind when I was a little girl.” When the kind girl became a very old woman and was dying, the neighbours in the village all gathered (聚拢) around her bed because they were that her secret of happiness would die with her. They asked, “Please tell us what the kind fairy said.” The lovely old woman still and said, “She told me that everyone needed me, no matter how safe they seemed, no matter how rich or poor, no matter how old or young She said that helping others would make me happy all my life.”
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