海岸地貌和陆架沉积序列的演化能较客观地反映海平面的升降状况。沙坝是由波浪携带泥沙堆积而成的一种狭长的、与海岸线平行的堆积体，沙坝将海水分割，内侧便形成一个封闭或半封闭的潟湖，潟湖常有潮汐通道与大海相连。图为全新世（11700年前至今）形成的美国东海岸地貌和陆架沉积序列模式图，图中a、b为三角洲。据此完成下列各题。

实验I：反应产物的定性探究﹣﹣按如图装置（固定装置已略）进行实验：

    I am Tony Smith. I am twelve. I am in No.101 Middle School. I'm in Class 2, Grade 7. My good friend is Jim Green. He is an English boy. He is twelve, too. He is in my class. He can speak good Chinese. Jane is in Class 2, too. I think she is a good girl. My Chinese teacher is Mr. Wang. His students like him. He is very cool.

下面四幅气候类型图，从左到右表示的气候类型依次是（    ）