查询可以作为______、______和______的数据源。
参考答案：窗体、报表、数据访问页
梯形的上底等于6，下底等于14，那么它的中位线将梯形分成两部分面积的比为______．
—Sorry, but we have no more than one ticket for 3-D Titanic now．
—That's OK．I'll take _____．
A．that
B．it
C．this
D．one
