二冲程柴油机:()
参考答案:
是指曲轴转一周3600,活塞在缸内上下往复运动二次,完成一个循环的柴油机。
With which of the following statements would the author be least likely to agree a. Children naturally and easily learn mathematics. b. Children learn to add before they learn to subtract. c. Most people follow the same pattern of mathematical development. d. Mathematical development is subtle and gradual.
2013年1月6日,国务院发布了《国务院办公厅关于转发发展改革委、住房城乡建设部绿色建筑行动方案的通知》提出到2015年末,()的城镇新建建筑达到绿色建筑标准要求。
A.5%
B.10%
C.20%
D.15%