给出如下代码：<br/>class Book<br/>attr_accessor :author<br/>attr_reader :title<br/>attr_writer :comments<br/>def initialize(author, title)<br/>@author = author<br/>@title = title<br/>@comments = &#91;&#93;<br/>end<br/>end<br/>book = Book.new("Chuck Palahniuk", "Fight Club")<br/>下列哪段代码是合法的？ A: "#{book.title} was written by #{book.author}." B: book.comments C: book.comments.each { |comment| puts comment } D: book.title = "Cooking Club"

有下列XML文档，XPATH：“/bookstore/book[position()<3]”能够查找到上述XML文档中的（ ）内容. <?xml version="1.0" encoding="ISO-8859-1"?> <bookstore> <book> <title lang="eng">Harry Potter</title> <price>29.99</price> </book> <book> <title lang="eng">Learning XML</title> <price>39.95</price> </book> </bookstore>

【单选题】以下哪个 sql 语句表示在 mysql 中创建 book 表,并添加 id 字段和 title 字段? A. create table book{ id varchar(32), title varchar(50) }; B. create table book( id varchar2(32), title varchar2(50) ); C. create table book( id varchar(32), title varchar(50) ); D. create table book[ id varchar(32), title varchar(50) ];

I lost a book, I can’t remember now. A: its title B: whose title C: the title of it D: the title of that

What is the title of the book that won him the Nobel Prize?

The title of the book Eve and her friends introduced in this unit is _______.

现有表 book，字段：id (int)，title (varchar), price(float); 其中 id 字段设为主键，使用 insert 语句向 book 表中 插入数据，以下语句错误的是（ ）。 A: insert into book (id,title,price) values(1,'java',100) B: insert into book (title,price) values('java',100) C: insert into book values ('java',100) D: insert book values('java',100)

现有表book，字段：id(int)，title(varchar),price(float);其中id字段设为主键，使用insert语句向book表中插入数据，以下语句正确的是 A: insert into book(title,price) values('java',100) B: c)insert into book values('java',100) C: insert book values('java',100) D: insert into book(id,title,price) values(1,'java',100)

现有表book，属性为：id(int),title(nvarchar(10)),price(numeric(6,2)),其中id为identity列，使用insert语句想book中插入数据，以下语句错误的是（ ） A: Insert book(id,title,price) values (1,’java’,56.3) B: Insert book(title,price) values (’java’,56.3) C: Insert book values (’java’,56.3) D: Insert book values (’java’,56)

Which one does Alex prefer, the book or the film with the same title?