closed book的意思|示意
n. 已结束的计划和行动等；一无所知的东西
closed book的用法详解
英语单词closed book的用法讲解
closed book的意思是闭卷，强调的是闭卷考试的状态。它常常出现在一些考试的规定中，用来表达考试要求，对考生有一定的约束作用。
closed book的用法很简单，一般都是跟考试相关的场景相结合，表示闭卷考试的概念。比如考试的规定，要求考生在考试前不能查看任何可能帮助考生作答的资料，而只能依靠自己，因此考试规定中就会出现closed book。
另外，closed book作为形容词，可以跟exam搭配使用，表达一场闭卷考试的意思。比如，Jack was nervous before the closed book exam. （杰克在闭卷考试前感到很紧张。）
总之，closed book是一个常用的考试术语，可以单独使用，也可以跟其他形容词进行搭配使用。
closed book相关短语
1、 closed-book exam 闭卷,闭卷考试
2、 A Closed Book 合上的书,高深莫测的事物,未揭开的秘密,不理解的事
3、 closed-book 关闭书,难理解的事
4、 read closed book 揭开秘密
5、 like a closed book 被迫有趣
6、 to be a closed book 意指无法明了的事
7、 closed-book test 不可看书的考试
closed book相关例句
A closed mind is like a closed book; just a block of wood.
封闭的心灵如同一本合上的书, 不过是纸堆罢了.
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Nuclear physics is a closed book to me.
核物理学是我完全不懂的一门学科.
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The man's early life is a closed book.
那人的早年生活是个不可告人的谜.
辞典例句
Fishing is closed book to me.
我对钓鱼是一窍不通.
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Economics was a closed book to him.
他对经济学一窍不通。
柯林斯例句
Nuclear physics is a closed book to most of us.
我们大多数人对原子核物理学一窍不通.
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