某学生为测定未知浓度的硫酸溶液，实验如下：用1.00mL待测硫酸配制100mL稀H₂SO₄溶液；以0.14mol•L^﹣1的NaOH溶液滴定上述稀H₂SO₄ 25.00mL，滴定终止时消耗NaOH溶液15.00mL．

    Jim, Tom and Tim are in the park. It's a small park, but it's nice. They can see some animals there. There are some birds in the tree. They are yellow. They can fly high. Quack… Quack… What do you hear? Oh，Some ducks. They can swim in the water. There are seven white ducks and nine black ducks. What's that? It's a cat. It's under the tree. It's white. It can jump very fast. The children like the small animals very much.

给下面字加部首组成字，再组词语。

忽____  ____   

廷 ____  ____  

斤 ____  ____

你想知道有多少扇门，可以说：