宁波市轨道交通1号线一期工程批复总投资123.88亿元,工程已于2009年6月全面开工建设,建设工期为5年,到2014年通车试运营,其中123.88亿元用科学记数法表示为( )
A:123.88×108元
B:1.2388×1010元
C:1.2×1010元
D:0.12388×1011元
下列各句中没有语病的一项是( )
The Roswell Incident
What did Person A and his wife see that night?
What did Mr Brazel find on his farm?
What did the army expert say about the pieces of metal?
What did Major Marcel think of the expert's opinion?
What did Person D and his parents see that night?
你的介绍可以这样开始: The Roswell Incident happened in the US in 1947…
小汽车的百公里油耗是衡量汽车性能的一个重要的理论指标,某品牌小汽车百公里耗油量为8L,已知汽油的热值为4.6×107J/kg,汽油的密度为0.75×103kg/m3.汽车发动机的效率为30%.请计算:
(1)8L汽油完全燃烧放出的热量;
(2)汽车行驶过程中受到的阻力.