求大神 解答 感激不尽

1. 求大神 解答 感激不尽

12、This is my grandfather and his name is Alan.
13、That is my grandmother and her name is Alice.
14、These are my sisters and they are in middle school.
15、Those are my brothers and they are in middle school,too.
16、He is my uncle and his name is Dale.
17、She is my aunt and her name is Cindy.
18、They are cousins and they are uncle's daughters.

2. 哪位大神来回答一下 感激不尽

3. 求大神解答 感激不尽

31.b=4  32.{x|x5}  33.[-1,7]  34.(0,1)  35.-3/5  36.个人觉得少条件  37.3x-5y+2=0
38.(2,0)   39.(-无穷，0]  40.二

4. 求大神解答 感激不尽

5. 求高手帮忙解答一下，不胜感激

答案是 0
－－－－－－－－－－
因为当 x 趋于 +∞，
分子 0 ≤ (1+cos(x)) ≤ 2
分母 x^2 趋于 +∞
 因此分式整体趋于 0

6. 大神求解答 感激不尽

7. 大神求解答 感激不尽

-81+1+6+2=-80+8=-72

8. 请高手回答'感激不尽