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【单选题】
The safety coefficient of the capacity of composite materials is usually ____ times of metal materials.
A.
0.8-0.9
B.
1.0-1.25
C.
1.15-1.2
D.
1.5-2.0
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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】Failure criterion of composite materials are: ____.
A.
Tsai – Hill criterion
B.
Mohr criterion
C.
Hoffman criterion
D.
Tsai – Wu criterion
【单选题】The longest composite panels in the world come from ____ aircraft.
A.
B747
B.
B787
C.
A380
D.
A350XWB
【多选题】To improve the efficiency and reduce the cost, manufacturing technologies of composite materials mainly include: ____.
A.
Automatic Tape Laying machine
B.
RTM molding
C.
RFI molding
D.
Autoclave molding