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We all know that diesel engines, in principle, work in the same way as gasoline engines do. Both kinds of engines are internal combustion engines, but each of them has its characteristic features. Now let us compare the diesel engine with the gasoline engine. Firstly, the explosive mixture of the gasoline engine is provided by a carburetor, but in the case of the diesel engine the supply is affected by an injection or “jerk” pump which forces a “shot” of fuel into each cylinder in turn according to the correct firing sequence. Secondly, the fundamental difference between gasoline and diesel engines is that in the gasoline engine the source of the heat for igniting the charge, namely, an electric spark, is generated outside the engine, and is taken, as it were, into the waiting charge at the required instant. In the diesel engine the source of heat for igniting the charge is created within the engine by compressing pure air to a degree that will initiate combustion and then injecting the fuel at the right time in relation to the movement of the crankshaft. According to the paragraph, which statement is true? A. The explosive mixture of the gasoline engine is provided by a carburetor. B. The fuel supply of the diesel engine is affected by an injection or “jerk” pump. C. Both of A and B
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【简答题】企业持有交易性金融资产期间对于被投资单位宣告发放的现金股利,投资企业应按持股比例确认投资收益。( )
【单选题】企业持有交易性金融资产期间对于被投资单位宣告发放的现金股利或企业在资产负债表日按分期付患、一次还本债券投资的票面利率计算的利息,应当确认为应收项目,计入“应收股利”或“应收利息”科目,并( )。
A.
计入投资收益
B.
冲减交易性金融资产成本
C.
冲减管理费用
D.
冲减财务费用
【简答题】新伐木材,在干燥过程中,当含水率大于纤维饱和点时,木材的体积________,若继续干燥,当含水率小于纤维饱和点时,木材的体积________。
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A.
运动补偿与运行估计
B.
减少时域冗余与空间冗余
C.
帧内图象数据与帧间图象数据压缩
D.
向前预测与向后预测
【单选题】在MPEG中为了提高数据压缩比,采用了()方法。
A.
运动补偿与运动估计技术
B.
减少时域冗余与空间冗余
C.
向前预测与向后预测
D.
帧内图像压缩与帧间图像压缩
【单选题】在MPEG中为了提高数据压缩比,采用了哪些方法()
A.
运动补偿与运动估计
B.
减少时域冗余与空间冗余
C.
帧内图像数据与帧间图像数据压缩
D.
向前预测与向后预测
【单选题】当木材的含水率小于纤维饱和点,继续干燥木材时,则其 ______。
A.
强度提高;
B.
干缩增大;
C.
强度不变,体积不变;
D.
(a+b);
【多选题】当木材的含水率小于纤维饱和点,继续干燥木材时,则木材(    )。
A.
强度提高    
B.
强度不变    
C.
干缩增大
D.
干缩不变    
E.
强度减小
【单选题】当木材的含水率小于纤维饱和点,继续干燥木材时,则其()。
A.
强度提高;
B.
干缩增大;
C.
强度不变,体积不变;
D.
(A+B)。
【单选题】在mpeg中为了提高数据压缩比,采用了哪些方法?
A.
运动补偿与运行估计
B.
减少时域冗余与空间冗余
C.
帧内图象数据与帧间图象数据压缩
D.
向前预测与向后预测
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