Jane always goes to school early. She likes to talk to her friends before class. After school she does not go home early. She is always late. Jane stops to see the animals in the pet shop. She likes to see the dogs. One of them is a little white dog. She watches the little dog play in the window of the shop. She watches for a long time, so she comes home late.
   One day her father and mother ask why she is late, and she tells them about the little dog in the pet shop.
   Jane is not late the next day. She stops to look in the window of the shop. But she doesn’t see the dog, and she is very sad. She is also very happy, today is her birthday.
   Mother shows her a big birthday cake and Father gives her a birthday surprise(惊奇). He gives her the little white dog from the shop. Jane is very happy. The next day Jane does not come home late. She runs home to play with the white dog.

阅读理解

    Many years ago, I was a shy boy and lived a very peaceful life. I liked school but I felt bored.

    And then I started the fourth grade. My teacher, Mrs. Chen, was a young woman who was good at writing, art and music. Her class was very interesting. With her help, I started Fun Club with some boys in my class. I also wrote a book called Through the Forest. And lots of my classmates liked it.

    However, I was surprised when fifty years later I got a letter about a reunion (聚会). A few days later, we had a reunion at Mrs. Chen's home. Reconnecting with Mrs. Chen was a journey back in time. Fifty years have passed, but my teacher still remembers every student. She even doesn't forget the class bully (欺负) — a boy used to hit me with snowballs on my way to school. Lots of teachers thought bullying was nothing serious at that time, but Mrs. Chen didn't agree. She put a stop to it at once when she found out about it.

    Now, in my mid-fifties, I appreciate the gifts Mrs. Chen has given me even more. It's never too late to say thanks to this fantastic teacher. I hope you are lucky enough to have one teacher like Mrs. Chen.

25℃，a L 0.1000mol/L CH₃COOH溶液与b L 0.1000 mol/L NaOH溶液混合，下列说法正确的是（   ）

如图所示，甲、乙两支完全相同的试管．分别装有同种液体。甲试管竖直放置，乙试管倾斜放置，两试管液面相平．则两试管中液体的密度关系为ρ_甲____ρ_乙；液体对两试管底的压强关系为P_甲____P_乙。（选填“大于”、“小于”或“等于”）

 下列实验基本操作正确的是（　　）