18～25题使用的数据如表1和表2所示。
| 表1 学生表(STUDENT.DBF)
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| 表2 选课表(SKB.DBF)
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要给学生表(STUDENT.DBF)增加一个出生日期字段(日期型)，下面选项中正确的是______。
A．CREATE TABLE STUDENT ADD COLUMN出生日期D
B．ALTER TABLE STUDENT ALTER COLUMN出生日期D
C．ALTER TABLE STUDENT ADD COLUMN出生日期D
D．ALTER TABLE STUDENT SET COLUMN出生日期D
参考答案：C
解析：
[分析]： 给表增加一个字段的命令格式如下：
ALTER TABLE表名ADD [COLUMN] 字段名 字段类型(宽度[,小数位])…
| 完型填空。 | ||||
| When I was a boy, every holiday that I had seemed wonderful. My 1 took me by train or by car to a hotel by the 2 . All day, I seem to remember, I 3 on the sands with strange 4 children. We made houses and gardens, and 5 the tide destroy them. When the tide went out, we 6 over the rocks and looked down at the fish in the rock-pools. In those days the 7 seemed to shine always brightly 8 the water was always warm. Sometimes we 9 beach and walked in the country, exploring (搜寻) ruined houses and dark woods and climbing trees. There were 10 in one's pockets or good places where one could 11 ice creams. Each day seemed a life-time. Although I am now thirty-five years old, my idea of a good 12 is much the same as it was. I 13 like the sun and warm sand and the sound of 14 beating the rocks. I no longer wish to 15 any sand house or sand garden, and I dislike sweets. 16 , I love the sea and often feel sand running through my fingers. Sometimes I 18 what my ideal (理想的) holiday will be like when I am 19 . All I want to do then, perhaps, will be to lie in bed, reading books about 54 who make houses and gardens with sands, who watch the incoming tide, who make themselves 20 on too many ices creams. | ||||
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