【单选题】Compared to a naturally aspirated diesel engine, a supercharged diesel engine has_________.
A.
a cylinder air charge of higher pressure
B.
increased pumping losses
【判断题】break语句可以用来结束某次循环重新开始下一次循环。
【判断题】沈祖祥老师认为春秋战国时期是中国旅游史上最伟大的时代
【单选题】下面代码的输出结果是 weekstr = "星期一星期二星期三星期四星期五星期六星期日" weekid = 3 print(weekstr[weekid*3: weekid*3+3])
【单选题】下面代码的输出结果是 weekstr = "星期一星期二星期三星期四星期五星期六星期日" weekid = 3 print(weekstr[weekid*3: weekid*3+3])
【单选题】The marine diesel engine is a type of diesel engine used on shipsThe _____ of its operation is not very difficult to understand.
【单选题】下面代码的输出结果是 weekstr = " 星期一星期二星期三星期四星期五星期六星期日 " weekid = 3 print( weekstr[ weekid * 3: weekid * 3+3 ] )
【单选题】下面代码的输出结果是 weekstr = "星期一星期二星期三星期四星期五星期六星期日" weekid = 3 print(weekstr[weekid*3: weekid*3+3])
【单选题】The diesel engine is also called compression ignition engine because______. A compression stroke is one of the four-strokes of a diesel engine.
B.
the diesel engine is ignited by the heat of compression not by spark .
C.
the diesel engine has a very high compression ratio.