The gas loads on the engine structure are constrained by means of hydraulically preloaded （） which connect the bed plate， frame sections and cylinder jackets into a single unit. A: connecting rods B: main bearing C: column D: tie rod

The gas loads on the engine structure are constrained by means of hydraulically preloaded （） which connect the bed plate, frame sections and cylinder jackets into a single unit. A: Aconnecting rods B: Bmain bearing C: Ccolumn D: Dtie rods

Suppose that both the cross-sectional area A and the length L of two straight rods are the same, and the axial tension forces P at both ends of the two are also the same. Only the materials of the two rods are different. Which statement about the stress σ and the elongation ΔL of the two rods is right?__________

What are the key parts of the suspension system?( ) A: shock absorbers B: rods C: springs

（） rods are not in proper condition so that too much fuel is supplied to the corresponding cylinder.