问题
选择题
下列式子：（1）
|
答案
=x-y x2-y2
，所以（1）错误；1 x+y
=b-a c-a
，所以（2）正确；a-b a-c
=±1，所以（3）错误；|b-a| a-b
=-x+y -x-y
，所以（4）错误．x-y x+y
故选A．
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下列式子：（1）
|
=x-y x2-y2
，所以（1）错误；1 x+y
=b-a c-a
，所以（2）正确；a-b a-c
=±1，所以（3）错误；|b-a| a-b
=-x+y -x-y
，所以（4）错误．x-y x+y
故选A．
| 阅读理解。判断正误。 | |
| |
| ( ) 1. Marie will go to visit Harry next week. ( ) 2. Marie is going to her cousin's birthday party this afternoon. ( ) 3. Marie will play tennis on Wednesday. ( ) 4. Marie will go to the movies on Friday evening. ( ) 5. Harry will go to the movies with them. |
This evening I'm going to my cousin's (表兄妹) birthday party. And tomorrow I have to go to the dentist
Would you like to come