终点误差的产生是由于（）。

A:滴定终点与化学计量点不符 B:滴定反应不完全 C:试样不够纯净 D:滴定管读数不准确

终点

求每个终点的平均票价的SQL语句是

A:SELECT终点，avg(票价)FROM ticket GROUP BY票价 B:SELECT终点，avg(票价)FROM ticket ORDER BY票价 C:SELECT终点，avg(票价)FROM ticket ORDER BY终点 D:SELECT终点，avg(票价)FROM ticket GROUP BY终点

求每个终点的平均票价的SQL语句是

A:SELECT终点，avg (票价) FROM ticket GROUP BY 票价 B:SELECT终点，avg (票价) FROM ticket ORDER BY 票价 C:SELECT终点，avg (票价) FROM ticket ORDER BY 终点 D:SELECT终点，avg (票价) FROM ticket GROUP BY 终点

求每个终点的平均票价的SQL语句是

A:SELECT终点，avg(票价)FROM ticket GROUP BY票价 B:SELECT终点，avg(票价)FROM ticket ORDER BY票价 C:SELECT终点，avg(票价)FROM ticket ORDER BY终点 D:SELECT终点，avg(票价)FROM ticket GROUP BY终点

求每个终点的平均票价的SQL语句是：

A:SELECT终点，avg (票价) FROM ticket GROUP BY 票价 B:SELECT终点，avg (票价) FROM ticket ORDER BY 票价 C:SELECT终点，avg (票价) FROM ticket ORDER BY 终点 D:SELECT终点，avg (票价) FROM ticket GROUP BY 终点