A:金鱼
B:蝗虫
C:青蛙
D:野兔
①此前相当部分种养殖户退出生产
②背后存在着炒作行为
③种养殖技术取得了重大突破
④随着收入水平提高居民对大蒜、猪肉的需求急剧增加
从1到9这九个自然数中任取一个,是偶数的概率是( )
已知角α的终边经过点P(12,32),则tanα的值为____
—I'm sorry I stepped outside for a smoke.I was very tired.
—There's no________for this while you are on duty.