造成柴油发动机过热的原因之一是消声器堵塞，使（）阻力增大。
参考答案：排气
— _____ is he going to get into?
—I'm not sure. Maybe a pilot. [ ]
A. What job else
B. What else job
C. What other
D. What other job
渗出物的防御作用有________，________，________，________，________，________。
