题目内容：

阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

Today we visit a small museum in the American state of Maryland. It 1. (call) the National Cryptologic Museum (国家密码博物馆). There you will find information 2. was once secret.

The National Cryptology Museum is on Fort George G. Meade, a military base near Washington, DC. 3. tells not only the story of cryptology but also the men and women who have worked in this 4. (usual) profession.

The word cryptology comes 5. the Greek “kryptos logos” It means “hidden word” Cryptology is writing or communicating in ways 6. (design) to hide the meaning of your words. 7. museum has many examples of equipment that was once used to make information secret. It 8. has equipment that was developed to read secret messages. The method of 9. (hide) exact meanings is called coding. People have used secret 10. (code) throughout history to protect important information.