—Why are you so tired?
—Well, I have _______ housework to do on weekends.
You can't imagine ________ difficult the road to success is.
公民向国家机关和国家工作人员提出批评或建议,可通过以下途径( ) ①贴大字报 ②打电话、写信、发电子邮件 ③向人大代表反映 ④通过媒体反映
若角α的终边经过点P(1,﹣2),则tanα的值为( )