How to develop a new airplane technology．,Features and -找考题网

单项选择题

A．How to develop a new airplane technology.
B．Features and possible usages of a special engine.
C．How to do experiment with dangerous engines.
D．How to do experiment with unmanned airplanes.

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A．Two.B．Four.C．Six.D．Five.

A．Two.
B．Four.
C．Six.
D．Five.

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A．How to communicate effectively.B．Why successful communication are important.C．What communication is.D．How to avoid direct communication.

A．How to communicate effectively.
B．Why successful communication are important.
C．What communication is.
D．How to avoid direct communication.

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