环境温度变化对燃机最大出力有何影响？为什么？

One afternoon,when I was on my way home, the sky 小题1:              

changed suddenly.Dark cloud were gathering. I began     小题2:              

to feel worrying because I didn’t have either a raincoat    小题3:             

or umbrella.It soon started to rain heavily                小题4:              

Just as I was hurrying home,I heard of someone calling  小题5:              

me from behind.I turned to have a look and find that       小题6:              

it was Jasime,a good neighbor of my,He immediately      小题7:              

offrerd to share his umbrella with me.We walked all      小题8:              

the way home.With Jasime’s help,I would have got        小题9:              

wet to the skin. How much thankful I was for his help!     小题10:

物质的量相等的下列烃，在相同条件下完全燃烧，耗氧量最多的是[ ]

A.C₂H₂

B.C₃H₆

C.C₄H₆

D.C₇H₈

后张法的张拉顺序应分批、分阶段、交错地张拉。( )

主动脉瓣关闭不全时，杂音的部位和时相为（）

A．胸骨左缘第二肋间收缩期杂音 

B．胸骨右缘第二肋间收缩期杂音 

C．胸骨左缘第三、四肋间收缩期杂音 

D．心尖区舒张中、晚期杂音 

E．胸骨左缘第三肋间舒张期杂音

牧歌取名自意大利民间的牧人歌曲，14世纪时为二至三个声部的抒情歌曲，最后有结束段“利都奈罗”，“新艺术”作曲家兰迪尼写作了14世纪牧歌。16世纪牧歌指根据知名诗人诗歌谱写的歌曲，是在贵族社交场合演唱的室内声乐曲，其直接前身是弗洛托拉。作曲家马伦齐奥、（）和（）第是意大利牧歌发展到后期的杰出代表。