A:炎帝
B:黄帝
C:蚩尤
D:禹
农具的发明和改进对农业发展能起到巨大的推动作用。下图农具按其出现的先后顺序排列应该是( )
—You must get a high income by doing that kind of job.
—Oh,my income's rather variable,but I earn 100 yuan a day________.
关于贝加尔湖特点的叙述,正确的是( )