【简答题】《山海经》中记载,不死民在_____,其为人_____,寿,_____。 拉祜族神话:在人类生活之初,人不会死。有一天,一个叫_____的人死了。大家非常惊奇。这时来了_____,告诉大家人死了可以_____,只要用_____和_____祭祀他就可以了。人死之后要归入_____。 苗族神话:一开始,人都不会死。年轻人很健壮,老人也可以一直活下去。后来人们照顾老人很辛苦,就派_____去天上问神怎么...
【单选题】材料为20CrMnTi的轴套,要求表面硬度为52〜55HRC,则其合理工艺方案为
【判断题】光敏电阻是利用半导体光敏效应制成的一种特殊电阻,对光线非常不敏感
【单选题】材料为20CrMnTi的轴套,要求表面硬度为52~55HRC,则其合理工艺方案为 ( )
【单选题】What was the difference between the odyssey years of young people in the past and today?
A.
The young people married later than the people in the past.
B.
The young people have childen later than the people in the past .
C.
The young people even began to work later than the people in the past.
【单选题】直升机在自转下滑飞行状态中,进入下降气流,旋翼转速: