公民的智力成果权不受性别、民族的限制，但受到年龄的限制。（  ）

平行四边形、矩形、菱形、正方形都具有的性质是（　　）

①4ac＜b²；

②方程ax²+bx+c=0的两个根是x₁=﹣1，x₂=3；

③3a+c＞0

④当y＞0时，x的取值范围是﹣1≤x＜3

⑤当x＜0时，y随x增大而增大

其中结论正确的个数是（   ）

   I  have a good friend．1 name is Peter．We study in Beijing Sunshine Secondary Schoo1．We are in the same(同一个)class．He sits in front of 2 ．His favourite lesson is Music．He  3many CDs．He likes 4 music very much．He likes playing football , t00．After school we  often   play  football in the  5 ．He is very helpful．We often help each 6 ．
   Peter  is  not a Chinese．He is from 7  ．He comes to Beijing 8  his family．His father is  a doctor and his mother is a nurse. They work from Monday    9   Friday．At weekends，his mother  likes shopping and his father likes fishing．Sometimes they go to the park．They all like Chinese  food．They  10   very happy．

根据短文理解，选择正确答案填空。 

    Jim is a junior high school student. He gets up 16:30 every morning. His home is near his school. He 2home after breakfast. He goes to school on foot. This is good for his 3. He has four lessons in the morning. He has lunch at home. After lunch he goes to school again. In the afternoon, Jim has lessons . He likes English and PE lessons. He has PE lessons on Tuesday and Friday. He is good at4football and basketball. He is also good at the high jump. His PE teacher likes5 very much. He often plays football with his classmates after school.