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【单选题】
During the development and application of the composite materials, we should put ____ as the top priority.
A.
Designability
B.
Safety
C.
Adaptability
D.
Cost-effective
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【多选题】The development trend in structural design of aircraft includes: ____.
A.
From isotropic structure to anisotropic structure
B.
From metals to nonmetals
C.
From structural weldments to integral parts
D.
From common structure to intelligent material structure
【多选题】The methods for space probe detect planets include: ____.
A.
Probe by orbiting
B.
Sampling and return
C.
Close observation by passing close
D.
On-site investigations