Which two are attributes of iSQL*Plus? ()
A. iSQL*Plus commands cannot be abbreviated.
B. iSQL*Plus commands are accessed from a browser.
C. iSQL*Plus commands are used to manipulate data in tables.
D. iSQL*Plus commands manipulate table definitions in the database.
E. iSQL*Plus is the Oracle proprietary interface for executing SQL statements.
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期权买卖双方之所以能成交,是因为他们对未来行情的判断正好相反。
A. 正确
B. 错误
卢照邻的“别有千金笑,来映九枝前”中,“千金笑”指代的是哪位古代美女?
何谓吸湿性?吸湿滞后性?影响吸湿有哪些原因?它与商品的储存保管的关系如何?
传统的GSM手机,全速率话音编码方式的话音编码速率为(),数据最高速率为()。