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【判断题】
的乐府诗多达七十馀首,在唐代乐府诗作者中堪称重镇。
A.
正确
B.
错误
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举一反三
【单选题】修改student表结构，将非空约束student_sname_nn设置为禁用。
A.
alter table student disable constraint student_sname_nn;
B.
alter table student enable constraint student_sname_nn;
C.
alter table student disable student_sname_nn;
D.
alter table student enable student_sname_nn;
查看完整题目与答案
【简答题】创建数据库 market ,在 market 中创建数据表 customers , customers 表结构如下,按要求进行操作。 字段名 数据类型 主键 非空 唯一 自增 字段注释 c_num int(11) 是 是 是 是 会员 id c_name varchar(50) 否 否 否 否 会员姓名 c_contract varchar(50) 否 否 否 否 联系方式 c_city varc...
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【简答题】阅读下面对话，从方框内7个选项中选择5个恰当的句子完成此对话。 A. When did you buy it? B. It’s much better than before. C.When does it start? D. Good idea. E. I won’t miss it! F. It will last two days G. How much are the tickets? A...
查看完整题目与答案
【简答题】根据上下文和你的实际情况把下面的对话补充完整。 Tom: Hi, Betty! Did you go out last weekend? Betty: No. I stayed at home. Tom: 小题1: _____________________? Betty: Because I had lots of things to do. Tom: 小题2: ________________...
查看完整题目与答案
【单选题】能够构成紧键联接的两种键是__。
A.
楔键和半圆键
B.
平键和切向键
C.
半圆键和切向键
D.
楔键和切向键
查看完整题目与答案
【单选题】D&M comapny _________ Kamchan Rice International Co., Ltd. about the rice.
A.
made an enquiry for
B.
made an enquire of
C.
enquire with
D.
made an enquiry of
查看完整题目与答案
【简答题】A. read      B. interesting    C. watched      D. saw      E. like        F. prefer A: What did you do during the winter holiday? B: I went skating, watched five films, did sports and ______小题1:...
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【单选题】When Secretary of State Condoleezza Rice stood beside Afghan President Hamid Karzai, she made an enlightened statement about cutting Afghanistan' s opium production, saying: 'It is a problem that took...
A.
Opium is closely related with the economy situation of Afghanistan people
B.
It is a hard job which needs time
C.
Afghanistan is not a democratic country
D.
It is a problem left by history and it need more patience
查看完整题目与答案
【单选题】能够构成紧键联接的两种键是______。
A.
平键和切向键
B.
楔键和半圆键
C.
半圆键和切向键
D.
楔键和切向键
查看完整题目与答案
【简答题】创建新的数据库,库名为 my_exercise_db ,然后在该数据库中新建数据表 my_ exercise _table ,表结构如表 12-11 所示。 表 12-11 my_ exercise _table 数据表结构 字段名 数据类型 长度 约束 cid integer 默认 主键、非空、唯一、自增 customer_name character varying 2 无 customer_...
查看完整题目与答案
相关题目：
【单选题】修改student表结构，将非空约束student_sname_nn设置为禁用。
A.
alter table student disable constraint student_sname_nn;
B.
alter table student enable constraint student_sname_nn;
C.
alter table student disable student_sname_nn;
D.
alter table student enable student_sname_nn;
查看完整题目与答案
【简答题】创建数据库 market ,在 market 中创建数据表 customers , customers 表结构如下,按要求进行操作。 字段名 数据类型 主键 非空 唯一 自增 字段注释 c_num int(11) 是 是 是 是 会员 id c_name varchar(50) 否 否 否 否 会员姓名 c_contract varchar(50) 否 否 否 否 联系方式 c_city varc...
查看完整题目与答案
【简答题】阅读下面对话，从方框内7个选项中选择5个恰当的句子完成此对话。 A. When did you buy it? B. It’s much better than before. C.When does it start? D. Good idea. E. I won’t miss it! F. It will last two days G. How much are the tickets? A...
查看完整题目与答案
【简答题】根据上下文和你的实际情况把下面的对话补充完整。 Tom: Hi, Betty! Did you go out last weekend? Betty: No. I stayed at home. Tom: 小题1: _____________________? Betty: Because I had lots of things to do. Tom: 小题2: ________________...
查看完整题目与答案
【单选题】能够构成紧键联接的两种键是__。
A.
楔键和半圆键
B.
平键和切向键
C.
半圆键和切向键
D.
楔键和切向键
查看完整题目与答案
【单选题】D&M comapny _________ Kamchan Rice International Co., Ltd. about the rice.
A.
made an enquiry for
B.
made an enquire of
C.
enquire with
D.
made an enquiry of
查看完整题目与答案
【简答题】A. read      B. interesting    C. watched      D. saw      E. like        F. prefer A: What did you do during the winter holiday? B: I went skating, watched five films, did sports and ______小题1:...
查看完整题目与答案
【单选题】When Secretary of State Condoleezza Rice stood beside Afghan President Hamid Karzai, she made an enlightened statement about cutting Afghanistan' s opium production, saying: 'It is a problem that took...
A.
Opium is closely related with the economy situation of Afghanistan people
B.
It is a hard job which needs time
C.
Afghanistan is not a democratic country
D.
It is a problem left by history and it need more patience
查看完整题目与答案
【单选题】能够构成紧键联接的两种键是______。
A.
平键和切向键
B.
楔键和半圆键
C.
半圆键和切向键
D.
楔键和切向键
查看完整题目与答案
【简答题】创建新的数据库,库名为 my_exercise_db ,然后在该数据库中新建数据表 my_ exercise _table ,表结构如表 12-11 所示。 表 12-11 my_ exercise _table 数据表结构 字段名 数据类型 长度 约束 cid integer 默认 主键、非空、唯一、自增 customer_name character varying 2 无 customer_...
查看完整题目与答案