单项选择题

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 only need to upgrade the replica of the previous model.
D．It can make sure all the bits fit together.

<上一题目录下一题>

热门试题

单项选择题

How does that Racoon cross water

A．It swims.
B．It raises its nose.
C．It uses hydrojets.
D．It uses its four-wheel drive

单项选择题

What does this refer to in the expression this appears less of a hazard

A．Some foreign power.
B．The design of the security systems.
C．A terrorist attack.
D．Sabotage by people working for an enemy country.