读某岛屿简图，完成小题．

甲、乙、丙、丁四地降水最多的是（ ）

短文阅读。
    I am Mike, I am 10 years old. I am from the USA. This is my new friend. She is a girl. She is 10 years old. She is from Canada. Her name is Amy. She is a good pupil.

阅读短文，选择正确的答案。
    A little mouse thought he was the tallest and strongest animal in the world. His mother said to him, "Don't say that in front of an elephant. He doesn't like that." The little mouse didn't listen to his mother. He went out to look for the elephant, but he didn't know who the elephant was. He asked an ant(蚂蚁) first, "Are you an elephant?" "No, I'm not," said the ant. "An elephant is much bigger than I am." Suddenly(突然), he saw four big trees. "Let me climb up(爬上) a tree. Then I can see where the elephant is," said the little mouse. "Get down! Get down!" someone shouted(喊) to him. "I'm the elephant. Go and climb that tall tree nearby. Then you can see me." "Now, I see. The elephant is the tallest and strongest animal in the world," said the little mouse.

用科学记数法表示602300，应该是（   ）

圆柱被一个平面截去一部分后与半球（半径为r）组成一个几何体，该几何体三视图中的正视图和俯视图如图所示．若该几何体的表面积为16+20π，则r=（　　）