【简答题】已知数列{a n }是等差数列,且a 1 +a 7 +a 13 =-π,则sina 7 =______.
【单选题】—That must have been a terrifying experience. —Yeah. I _____ in the damaged car, unable to move.
【简答题】已知A为锐角,且cosA= 1 2 ,则sinA=______.
【简答题】What can you do to create a memorable guest experience as a housekeeper?
【单选题】Down-selling means the guest will spend _________, however, may lead to overall profit by return visit and a better guest experience.
【单选题】甲公司2×16年度会计处理与税法处理存在差异的交易或事项如下:(1)持有的交易性金融资产公允价值上升60万元。根据税法规定,交易性金融资产持有期间公允价值的变动金额不计入当期应纳税所得额;(2)计提与担保事项相关的预计负债600万元。根据税法规定,与上述担保事项相关的支出不得税前扣除;(3)持有的可供出售金融资产公允价值上升200万元。根据税法规定,可供出售金融资产持有期间公允价值的变动金额不计入...
【单选题】门洞口高度大于( )mm时,应设上亮窗。
【简答题】已知A是锐角,且sinA= 1 3 ,则cos(90°-A)=______.
【单选题】已知 sina=12/13 ,且 a 是 . 第二象限角,cosa=