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
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
举一反三
- 复合材料结构设计中的安全系数，通常是金属结构材料的________倍。 A: 0.8-0.9 B: 1.0-1.25 C: 1.15-1.2 D: 1.5-2.0
- During<br/>the development and application of the composite materials, we should<br/>put ____ as the top priority. A: Designability B: Safety C: Adaptability D: Cost-effective
- According<br/>to the ratio between composite materials and structural weight, which<br/>of the following used most composite materials? ____. A: F-22 B: A380 C: A400M D: B787
- According to source, composite materials divided into: （） A: conductive composite materials B: natural composite materials C: artificial composite materials D: damping composites
- n the direct materials budget, the quantity of direct materials to be purchased is computed byadding direct materials required for production to A: desired ending direct materials. B: beginning direct materials. C: desired ending direct materials lessbeginning direct materials. D: beginning direct materials less desiredending direct materials.