改错题。

( ) 1. —Are you Jack ?  —Yes, I'm.                  

                  A   B        C                 D

(     ) 2. Who's your uncle?    He's a doctor.                    

               A     B                     C        D 

(     ) 3. Lucy and Lily are girl. They are eleven.                   

                        A         B   C                 D

(     ) 4. He is strong. He is America.                      

              A       B           C     D

(     ) 5. This's  my twin brother.                          

                A     B   C     D  

产业链各方所需进行的工作有（）.

A、芯片平台

B、终端厂家

C、仪器仪表厂家

D、改进软件算法