有效竞争
You want to display the titles of books that meet these criteria: 1. Purchased before January 21, 2001 2. Price is less then $500 or greater than $900 You want to sort the results by their data of purchase, starting with the most recently bought book. Which statement should you use? （） [" SELECT book_title FROM books WHERE price between 500 and 900 AND purchase_date < '21-JAN-2001' ORDER BY purchase_date;"," SELECT book_title FROM books WHERE price IN (500,900) AND purchase_date < '21-JAN-2001' ORDER BY purchase date ASC;"," SELECT book_title FROM books WHERE price < 500 or > 900 AND purchase_date < '21-JAN-2001' ORDER BY purchase date DESC;"," SELECT book_title FROM books WHERE (price < 500 OR price > 900) AND purchase_date < '21-JAN-2001' ORDER BY purchase date DESC"]
气瓶附件包括（）等。 ["瓶帽；","液位计；","防静电装置；","紧急切断装置"]
（）是行使管理职能的组织基础，建立健全合理的园所机构和制定相应制度，对贯彻教育方针，完成幼儿园双重任务，具有保证作用。 ["教育局","幼教机构","幼儿园","相关领导部门"]
What can you determine about the following linguistic sorts based only on their names?（） 1. GERMAN 2. FRENCH_M multilingual [" 1 is a monolingual sort."," 2 is a monolingual sort."," 1 is case insensitive."," Both 1 and 2 are case insensitive.","Case sensitivity is unknown."]
流动比率
