单项选择题
（）is not a feature of the electronic controlled engines.
A.Lower fuel consumption
B.Better balanced cylinder power
C.A shorter overhaul period
D.Less smoke emission
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相关考题
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单项选择题
If a camshaft-less engine has a normal injection pressure at rated speed, the injection pressure will be at slow speed（）
A.too low
B.a little lower
C.a little higher
D.exactly the same -
单项选择题
If a cam-controlled engine has a normal injection pressure at rated speed,the injection pressure will be（）at slow speed.
A.a little lower
B.a little higher
C.too low
D.exactly the same -
单项选择题
The main purpose of changing main engine to electronic controlled is not to（）
A.control fuel injection time more precisely
B.control fuel injection rate more precisely
C.meet the environmental requirements
D.meet high engine speed requirements
