MCQOPTIONS
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				| 1. | 
                                    Let an airplane in a steady level flight be trimmed at a certain speed. A level and steady flight at a higher speed could be achieved by changing | 
                            
| A. | engine throttle only | 
| B. | elevator only | 
| C. | throttle and elevator together | 
| D. | rudder only | 
| Answer» D. rudder only | |