如图，已知PA⊥平面ABC，BC⊥AC，则图中直角三角形的个数为____．

⑴Happy New Year！ ____              A. Happy New Year.

⑵What's the time? ____               B. It's 8:15.

⑶Do you like banana? ____            C. Yes, I do.

⑷Which class are you in? ____         D. I'm in Class Four Grade Five.

⑸Who's this girl? ____                E. She's my sister.

⑹How's the weather today? ____      F. It's Cloudy.

⑺Open it and see. ____               G. Thank you.

⑻This is for you. ____                H. OK.

⑼How are you? ____                 I. I'm from China.

⑽Where are you from? ____          J. Fine, Thank you.

下列语句排序最恰当的一项是（　　）
①也许是山边小餐馆的笑眯眯老板，或是恒河畔凝视落日的独眼老妇。
②毕竟，再怎么风光明媚的自家山川，总会有看腻的时候。
③旅行，是从固体的生活中抽离去异地寻觅另一个自己的活动吧！
④另一个自己是什么样呢？
⑤旅行迷人之处正在这里，扛着不轻不重的今生，到处浏览自己的前生与来世。
⑥旅行，正好让人从自身的禁锢中放飞，歇够了，再飞回。