There（）a book and some magazines on the desk...

第1题

[单选题] The BOOKINGS table contains online booking information. When a booking is confirmed, the details are transferred to an archival table BOOKINGS_HIST and deleted from the BOOKINGS table. There is no fixed time interval between each online booking and its confirmation. Because sufficient space is not always available from the delete operations the high-water mark (HWM) is moved up and many rows are inserted below the HWM of the table. The BOOKINGS table has Automatic Segment Space Management (ASSM) and row movement enabled. The table is accessible in 24x7 mode. What is the most efficient method to reclaim the space released by the delete operations in the BOOKINGS table？（）

A、Perform EXPORT, DROP, and IMPORT operations on the BOOKINGS table sequentially B、Shrink the BOOKINGS table by using the ALTER TABLE SHRINK SPACE command C、Move the BOOKINGS table to a different location by using the ALTER TABLE MOVE command D、Deallocate the space in the BOOKINGS table by using the ALTER TABLE DEALLOCATE UNUSED command

点击查看答案

第2题

[填空题] There is nothing so admirable as a man whose sacrifices his life and happiness for others.

点击查看答案

第3题

[单选题] 如果想使某两个关键字(例如computer和book)同时出现,而不是任何一个出现即可,我们可采用的方法是（）

A、computer OR book B、computer AND book C、NOT computer AND book D、computer AND NOT book

点击查看答案

第4题

[单选题] There are several ways you can find out about the countries and places you wish to visit. You can talk to friends who have travelled to the places. Or you can go and see a colour film. Or you can read travel books. It would seem that there are three kinds of travel books. The first are those that give a personal, subjective (主观的) account of travels which the author has actually made himself, if they are informative and have a good index (索引), then they can be useful to you when you are planning your travels. The second kind are those books whose purpose is to give a purely objective (客观的)description of things to be done and seen. If a well-read, cultured person has written such a book, then it is even more useful. It can be sorted as a selected guide book. The third kind are those books which are called "a guide" to some place or other. If they are good, they will, in addition to their factual information, give an analysis or an explanation. Like the first

A、how to travel B、how to buy travel books C、how to read a travel book D、travel books

点击查看答案

第5题

[单选题] There are several ways you can find out about the countries and places you wish to visit. You can talk to friends who have travelled to the places. Or you can go and see a colour film. Or you can read travel books. It would seem that there are three kinds of travel books. The first are those that give a personal, subjective (主观的) account of travels which the author has actually made himself, if they are informative and have a good index (索引), then they can be useful to you when you are planning your travels. The second kind are those books whose purpose is to give a purely objective (客观的)description of things to be done and seen. If a well-read, cultured person has written such a book, then it is even more useful. It can be sorted as a selected guide book. The third kind are those books which are called "a guide" to some place or other. If they are good, they will, in addition to their factual information, give an analysis or an explanation. Like the first

A、the book written by some people who have had the same travel experience themselves B、the book which tells you what is worth doing and seeing based on the facts C、the book in which a lot of big adjectives are used to draw your attention D、the book which offers you a lot of useful information like a tour guide

点击查看答案

第6题

[] The date of the publication must be noticed because （）.

A、A. the world is changing and so are the places you are going to visit B、B. the price of the book is always changing C、C. the author of the book may be different D、D. the contents of the book are always the same

点击查看答案

第7题

[单选题] （） shall be provided to every oil tanker of 150 tons gross tonnage and above to record relevant machinery space and cargo/ballast operations.

A、Oil Record Book Part Ⅰ B、Oil Record Book Part Ⅱ C、Oil Record Book Part Ⅰ or Part Ⅱ D、Oil Record Book Part Ⅰ and Part Ⅱ

点击查看答案

第8题

[单选题] 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?（）

A、SELECT book_title FROM books WHERE price between 500 and 900 AND purchase_date < '21-JAN-2001' ORDER BY purchase_date; B、SELECT book_title FROM books WHERE price IN (500,900) AND purchase_date < '21-JAN-2001' ORDER BY purchase date ASC; C、SELECT book_title FROM books WHERE price < 500 or > 900 AND purchase_date < '21-JAN-2001' ORDER BY purchase date DESC; D、SELECT book_title FROM books WHERE (price < 500 OR price > 900) AND purchase_date < '21-JAN-2001' ORDER BY purchase date DESC;

点击查看答案

第9题

[单选题] In my bedroom, there is a pair of scissors, a stack of books and （） flowers on my desk.

A、a piece of B、a pocket of C、a slice of D、a bunch of

点击查看答案

There（）a book and some magazines on the desk.

请使用微信扫码支付