【单选题】The equations below are linear equations of a system where a, b, and c are positive integers. ay + bx = c ay - bx = c Which of the following describes the graph of at least 1 such system of equations ...
【简答题】连词成句。 1. is cold here the weather . 2. hot is sunny it and here . 3. in is Beijing it windy . 4. make us a let snowman . 5. play us football let .____