问题 单项选择题

上颌骨阻抗中心的三维坐标在()

A.在正中矢状面上,高度在梨状孔下缘,前后位置在第二前磨牙和第一磨牙之间

B.在正中矢状面上,高度在前磨牙根尖区,前后位置在第二前磨牙处

C.在正中矢状面上,高度在眶下孔水平,前后位置在尖牙与第一前磨牙之间

D.在正中矢状面上,高度在前磨牙根尖区,前后位置在第一磨牙处

E.在正中矢状面上,高度在眶下孔水平,前后位置在第二前磨牙和第一磨牙之间

答案

参考答案:A

改错题

改错部分。

下列各句A、B、C、D四处均有一处错误,请指出并改正。

1. He had looked forward to meet her all day and now he was alone with his roses, and

            A           B                        C

    chocolates, like a fool.                                              ________________

                            D

2. Find that Zhin was heart-broken, he grandmother finally decided to let the couple cross

          A                               B                                                                               C

    the Milky Way to meet once a year.                                   ________________

                                                  D

3. He could not have Yong Hui getting away with tell people lies.             ________________

             A                                             B               C           D

4. Their balance diets became such a success that before long Wang Peng became slimmer

                       A                                B                        C

    and Yong Hui put on more weight.                                   _________________

                                        D

5. Yes, the fact is that I earned my passage by working as an unpaid hand, that accounts for

                                                                         A                    B                  C         D

       my appearance.                                                 __________________

6. At this moment, they see a penniless young man to wander on the pavement outside their

        A                              B                                        C                 D

    house.                                                                           

7. Just have you sit here is a great honor! As for the bill, sir, please forget it.  

            A                                    B              C                                  D  

                                                                                   

8. The earth became so violent that it was not clear that the shape would last or not.  

                          A                      B                            C                                     D

__________________

9. Walking does need a bit practice now that gravity has changed.          

                         A           B      C         D                                                 

10. Last month I was luck enough to have a chance to make a trip into space with my friend

                                           A                         B                      C         D

Li Yanping, an astronomer.                                        _________________

解答题