与查询的最大区别在于,查询只能查阅指定的数据,而()不但可以查阅数据,还可以修改数据,并把修改结果送回到源数据表中.
参考答案:视图
按要求改写下列句子,每空一词。
l. It seems that Kate has supper at home.(改为同义句)
Kate________ ________have supper at home.
2.Cities will be very big and crowded.(改为否定句)
Cities________ ________ ________ very big and crowded.
3. I can't have any pets because my mother hates them.(对画线部分提问)
________ _______you have any pets?
4. Please telephone her tomorrow morning.(改为同义句)
Please________ ________ ________tomorrow morning.
5. He has some money,too.(改为否定句)
He________ ________ ________money,________.
胚泡植入后子宫内膜改称为()。
A.蜕膜
B.胎膜
C.绒毛膜
D.滋养层
E.胎盘膜