问题
填空题
若|a-1|+a2-ab+
|
答案
原式=|a-1|+（a-
b）2=0，1 2
∴a-1=0，a-
b=0，1 2
a=1，b=2．
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若|a-1|+a2-ab+
|
原式=|a-1|+（a-
b）2=0，1 2
∴a-1=0，a-
b=0，1 2
a=1，b=2．
| 完型填空。 | |||
| One Sunday morning Pedro and his mother went __1__ a shoe shop __2__ Pedro a pair of new shoes. Mrs. Lambert put her bag on a chair __3__ she looked at some shoes. She could not see __4__ she liked and went away. Suddenly (突然) she said, "Oh, my bag, someone __5__ it away!" All the other people in the shop stopped __6__ and looked at her. Pedro ran after the man at once. A few minutes __7__, Pedro came back with __8__. He __9__ it to his mother. She opened the bag and had a look in __10__. Then she said, "Oh, god, nothing is lost." | |||
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