季风指数是季风现象明显程度的量值，反映一个地区季风环流的强弱程度。如图表示1880~2000 年东亚地区夏季风指数（a）和冬季风指数（b）距平值曲线。读图，完成下列问题。

补全对话。

A. Yes，they are

B. You are welcome

C. No, it's quite near.

D. But you mustn't touch them.

E. Walk along this road and then turn left.

Alice goes to the Zoo with Mum. They want to see the monkeys now.

Alice: Excuse me. Is the Monkey House far from here?

James: ____.

Alice: How do we get to the Monkey House?

James: ____. You can see the monkeys

Alice: Thank you very much.

James: ____

Alice: Look, Mum! Are the monkeys climbing the tree?

Mum: ____Some of them are eating the bananas on the tree.

Alice: Can I take some photos of them?

Mum: Sure. ____.

Alice: Oh, I know.

夏天，教室外蝉的叫声影响了同学们的学习。蝉能发出声音是由其腹部下方一层薄薄的发音膜____ 引起的。老师把教室的门窗关起来，大家听到的声音明显减小，这是在声音____ 过程中减弱噪声。

新疆的西瓜很甜，这一现象主要是由下列哪种因素决定（  ）