A:
B:
C:
D:
A. Yes, we do.
B. What do you do on Chinese New Year's Day?
C. My favourite holiday is Chinese New Year's Day.
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从甲、乙两班分别任意抽出10名学生进行英语口语测验,其测验成绩的方差分别为S12= 13.2,S22=26.26,则
植被覆盖率高的地区,往往降雨量多、气候湿润,这种现象说明( )