一个等腰三角形的一个底角是30°，它的顶角是____度。

1620年11月11日是《五月花号公约》的诞生日。“在上帝面前共同庄严立誓签约，自愿结为一公民团体。为使上述目的得以顺利进行、维持并发展，亦为将来能随时制定和实施有益于本殖民地总体利益的一应公正和平等法律、法规、条令、宪章与公职，吾等全体保证遵守与服从。……签署姓名如下，以资证明。”该公约体现出（    ）

①自我管理   ②契约精神   ③天赋人权   ④依法自治

    I think 1likes dogs. Dogs are our friends. My friend Tomson likes dogs very2 . He has a big dog. 3name is Bobo. He's bright(聪明的). Every Saturday aftemoon Tomson takes Bobo for a long walk in the street. Sometimes Tomson takes Bobo to the park. Tomson4the frisby and Bobo catches it in the air. Bobo can open the door and close the door. When Tomson goes to school, Bobo stands in5of the door and waits6Tomson coming. When he sees Tomson, he7 the door and catches his bag. What a bright dog!

    I like Bobo. I often go to Tomson's home to play8 him. I often give Bobo  9  to eat. I want to have a dog, too.