The main characters of passive radar homing guidance are: ____.
A. Can be operated without attention on it after launch
B. Equipped with radar equipment and antenna
C. Less affected by weather and time
D. Strong anti-interference ability
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China's TTC system is mainly composed by: ____.
A. Ground control center
B. TTC station
C. Maritime surveying ship
D. Space-based relay satellite
Main requirements should be considered in design of aircraft structure for the whole picture of the aircraft are: ____.
A. Meet the flight and ground static strength requirements
B. Meet the aircraft service life requirements
C. Meet the requirements of aircraft structure technology
D. Meet the requirements of aircraft maintenance and reliability
Which of the following requirements are needed for selection of structural materials of aircraft? ____.
A. High efficiency in structure
B. Good manufacturability
Convenient to maintain
D. High reliability as the life span
Failure criterion of composite materials are: ____.
A. Tsai – Hill criterion
B. Mohr criterion
C. Hoffman criterion
D. Tsai – Wu criterion
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