次级点火的燃烧电压的大小取决于点火能量、()、()等等。
参考答案:混合气的浓度;汽缸压力
以下哪些原因可以导致创伤性关节炎()
A.O型腿
B.内分泌紊乱
C.关节扭伤后治疗不彻底
D.关节内骨折
E.小腿骨折畸型
Radiation spreads a fire by().
A.transferring heat across an unobstructed space
B.heated gases flowing through ventilation systems
C.burning liquids flowing into another space
D.transmitting the heat of a fire through the ship's metal