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(xiàng)選擇題

What determines the number of events occurring in a cycle of operation in an internal combustion engine?()

A.Crankshaft revolution
B.Type of engine (diesel or gasoline)
C.Distance a piston travels during a stroke
D.Number of pistons

微信掃碼免費(fèi)搜題