湿地的功能是（  ）

①涵养水源  ②蓄洪防旱  ③调节气候  ④维持生物多样性．

实验小组为探究“乳酸菌无氧呼吸是否有气体产生”，设计如下图所示的两个实验装置，两装置均置于25℃的恒温水浴中，下列说法正确的是

根据短文内容完成下列任务。
   It's October 16th. It's Jeff's fifteenth birthday. In the morning Jeff gets up very early. He goes to Tokyo with his parents. They are going to stay there for a week. Tokyo is the capital of Japan. It's very nice. They can see many parks in Tokyo. Jeff likes Tokyo very much.
   They live in Green hotel. It's very big and clean. Oh, in the hotel Jeff meets Iris old friend Lisa. The two kids are very (A)        . In the evening Jeff's father has a birthday party for Jeff in the hotel.  (B) Lisa and her parents also come to Jeff's birthday party. They have a good time. At the party Lisa sings a Japanese song for Jeff, at about twelve o clock, Jeff doesn’t go to bed. He still plays games with Lisa.
When is Jeff's birthday?
____
How does Jeff get to Tokyo?
____
____ 选择意思相近或相同的选项替换划线邵分。
They can see many parks in Tokyo.

____ 选择适当的词汇完成(A)空格部分，使句意完整。
A. interesting  B. healthy         C. happy         D. unhappy
将划线部分(B)翻译为汉语。
____

如果等腰三角形的两边长是25cm和10cm，那么它的周长是（ ）