Science and technology have in important ways to the improvement of agricultural production.
A. attached
B. assisted
C. ontributed
D. witnessed
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The little girl was so frightened that she just wouldn’t her grip on my arm
A. oosen
B. remove
C. relieve
D. dismiss
A word processor is much better than a typewriter in that it enables you to enter and your text more easily.
A. register
B. edi
C. propose
D. discharge
以下修改xs表结构【xhchar(8),xmchar(8),bjchar(20)】的命令正确的有()。【本题2项正确】
A. altertablexsmodifyxhchar(10)notnull;
B. altertablexsmodifyxhchar(10)notnullafterbj;
C. altertablexsmodifyxh学号char(10)notnullafterbj;
D. altertablexsmodifyxhchar(8)as学号char(10)notnull;
以下有关SQL模式的描述,正确的有()。【本题2项正确】
A. 用户在Mysql配置文件中进行sql_mode变量值的设置,这属于全局SQL模式设置
B. 用户可以在Mysql命令提示符下使用set@@sql_mode命令来重新进行全局SQL模式的配置
C. 用户可以在Mysql命令提示符下使用select@@sql_mode命令进行全局SQL模式的查询
D. 用户可在客户端界面中使用set@@sql_mode命令进行会话SQL模式的配置
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