DS : if a and b are real numbers, |a|/|b|=a/b, then is b>0?
1) a>0 2) ab>0
我选的是A
DS : if k and w are the slopes of two lines, then is w > 2? ++注意是2不是3, 记得以前的小狗上出现过的是3, 难道是变体 = =?
1) k is bigger than -1/3
2) k is less than -1/4
我选的是A = = 这种斜率的题很不会做 纠结了半天觉得1应该就sufficient了的.. 不排除做错的可能性 大家讨论讨论吧..
PS : |a+2|>3, which one is NOT the value of a?
answers : -3, -2, 4, 5, 6
作文~ 我竟然把它忘了.. 希望分数不要太难看.. 阿门.. 我遇到的argument好像是说renewable energy companies的.. 说它们很successful然后说话的这个公司也要参与新能源以求更好的发展.. issue是说students should compete among themselves and against students from foreign countries的..
