A:南方古猿与能人
B:直立人
C:智人
D:以上三项都是
School students _____ smoke because it is bad for their health and it is against the law.
关于中纬西风带的叙述,正确的是( )①北半球为西南风②南半球为西南风③在中纬西风影响下降水较少④中纬西风由副热带高气压带流向副极地低气压带