Snakes are just about the most frightening thing in the world, according to Dr. Henry Walton Jones Jr. The  only thing  ____(bad) than a snake you can see is a snake you can't see, however. And thanks ____the photos Sunshine Coast Snake Catchers offer, you can experience the latter horror from the comfort of almost anywhere else besides the place____that snake is.

    The snake-like animals' removal(移动) and relocation____(serve) from Queensland, Australia posted a challenge to its 51,000 some-odd fans____(find) the snake in the photo.

    Any luck? The photo shows that this particular backyard seems like____regular ＂I Spy＂ book for snakes, so it's understandable if they are still looking hard. The snake is actually in the top right corner,____ (hide) in the crook(藤条) between the two fences.

    Fear of snakes ____(call) ＂Ophidiophobia＂(蛇恐怖症) or ＂being a rational person＂. People are afraid of a lot of odd things, though.

    This fun little puzzle proves to just be further evidence that Australia is a____(terrible) dangerous place where everything ____(try) to eat you. We'll just stick to trying to find turtles in flowers, thank you very much.

线段有两个端点。

（Ⅰ）求角C的值；

（Ⅱ）若c=2，且△ABC为锐角三角形，求a+b的取值范围．