99色精品-9色在线-99色在线-99色视频 国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

單項選擇題

A naturally aspirated diesel engine at full throttle will have an intake manifold pressure ()

A.slightly less than atmospheric pressure
B.approximately equal to exhaust manifold pressure at all times
C.that is widely fluctuating constantly
D.decreasing as engine load increases

微信掃碼免費搜題