【简答题】已知直线 的斜率为 ,直线 经过点 ,且 ,则实数 的值为 ▲ .
【简答题】For each blank in the following passage there are four words or phrases marked A, B, C and D. Fill in each blank with the word or phrase that best fits the context. Blessed indeed is the man who hears...
【简答题】已知直线 的斜率的范围是 ,则该直线倾斜角的范围是
【单选题】Fill in the blank He was ______________ when he discovered that he didn’t have enough money to pay for the red wine he had ordered.