双角U形压弯件中r<0.5t的坯料展开公式:L=L1+L2+L3+()t。
A: 0.5
B: 0.6
C: 0.7
D: 0.8
A: 0.5
B: 0.6
C: 0.7
D: 0.8
举一反三
- 4 Complete the words. ► h u m a n human 1 p r d c t b l e ____ 2 d i s e a r ____ 3 f m n e ____ 4 h r m f l ____ 5 a t m o e r e ____ 6 e n v r o m n t ____ 7 p l l t n ____ 8 l q u d ____ 9 d s s e ____ 10 c l m t ____
- RL串联电路的时间常数t为(1)RL;(2)L/R;(3)R/L
- 我国适宜的饮水氟浓度为() A: 0.5~1.0mg/L B: 1.0~1.5mg/L C: 0.7~1mg/L D: 0.7~1.2mg/L E: 0.5~0.9mg/L
- 4 Complete the words. ► l u n g c a n c e r lung cancer 1 m _ m _ r _ l _ _ s s ____ 2 a r _ r _ t i c ____ 3 b r _ _ n ____ 4 b l _ _ _ ____ 5 s t r _ _ e ____ 6 h _ _ r t d _ s _ _ s e ____ 7 d _ s _ b _ l _ t y ____
- 单位质量力的量纲是 A: L*T^(-2) B: M*L^2*T C: M*L*T^(-2) D: L^(-1)*T