Why will Boeing not need a replica of the 777?A.It can use computers to check the design.B

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Why will Boeing not need a replica of the 777?

A.It can use computers to check the design.

B.It already has enough experience with plans.

C.It will not need to upgrade the replica of the previous model.

D.It can make sure all the bits fit together.

热搜:a是b的充分条件,b是a的必要条件吗