北美洲和南美洲的分界线是（　　）

    I'm the mother of a fourteen-year-old. I have a rule for my daughter: be among the top 5 students or get punished in one way or another. She has been doing very well in school, but some friends of mine keep telling me that I put too much pressure on her. Am I wrong?

写作要点：

1)表明自己的看法；

2陈述自己的理由(可举例说明)；

3)提出至少两条建议。

要求：1)短文词数100左右。

2)内容充实，结构完整，语意连贯。

Hi, TigerMom,

    What puzzles you is actually a puzzle for many parents in China. My idea is



                                                                                                                                                                                                 Yours
                                                                                                                                                                                                  LiHua

二次函数y=ax²+bx+c的部分图象如图所示，则下列正确的说法有（   ）

①点P（ac，b）在第二象限；

②x＞1时y随x的增大而增大；

③b²﹣4ac＞0；

④关于x的一元二次方程ax²+bx+c=0解为x₁=﹣1，x₂=3；

⑤关于x的不等式ax²+bx+c＞0 的解集为0＜x＜3．