一般常用篇、章、节形式的教材是（）教材。
A、讲授法教材；
B、角色扮演法教材；
C、多媒体教学法教材；
D、案例法教材。
参考答案：A
---Do you know _______?
---At the end of July.
A．how soon is your sister coming back home
B．how often Nancy hears from her pen friend[
C．when the London Olympic Games were held
D．when will the new computer game come out
对emp表增加雇员被雇佣时间come列，其数据类型为日期型，正确的语句是( )。
A．ALTER TABLE emp ADD come Date
B．ADD TABLE emp come Date
C．ALTER TABLE emp come Date
D．ADD come Date TABLE emp
