问题
判断题
所有加密技术都只是改变了符号的排列方式，因此只要对密文进行重新排列、组合就很容易解密了。
答案
参考答案：错
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所有加密技术都只是改变了符号的排列方式，因此只要对密文进行重新排列、组合就很容易解密了。
参考答案：错
| 阅读理解。 | ||||||
| ||||||
| 1. Mary found (发现了) ________. | ||||||
| A. a blue and white cat B. a black and white pencil case C. a black backpack D. keys | ||||||
| 2. If (如果) you find a school ID card, it may be (可能是) ________. | ||||||
| A. Mike's B. Lisa' C. Tom's D. John's | ||||||
| 3. Lisa found a cat ________. | ||||||
| A. in the school B. at home C. at the school gate D. in the classroom | ||||||
| 4. If you lost your keys, you may (可以) call ________ to find it. | ||||||
| A. 487-2349 B. 476-5939 C. 412-9856 D. 498-2456 | ||||||
| 5. You can see ________ notice(s) (公告) in the LOST AND FOUND. | ||||||
| A. 1 B. 4 C. 2 D. 6 |