下列熟语中，没有使用借代手法的一项是

在平面直角坐标系$xoy$中，点P的直角坐标为$\left(1,-\sqrt{3}\right)$。若以圆点O为极点，x轴正半轴为极轴建立坐标系，则点P的极坐标可以是

关汉卿用一种比较成熟的戏剧形式创作了悲剧作品《窦娥冤》。这种形式是（   ）

2012年9月11日，日本政府宣布购买钓鱼岛，严重侵犯了中国的领土主权，造成中日关系紧张，钓鱼岛危机升级，对上述日本政府的行为，当代青少年应该（    ）

根据短文理解，回答下列问题。
Cyber Boy   5-26-2013   2:15 pm
    Hi, I'm planning a trip to Europe this summer. I haven't decided where to go yet, but I'd like to experience Britain and France. And I don't want to spend too much money. Any ideas?
Esperanto   5-26-2013   2:23pm
     I had a tour to Britain last year. It's a very nice place. I had a great time there. If you get a chance, visit Stratford. That's the town where Shakespeare lived.
Yoshi   5-26-2013   2:28 pm
    First you should make sure what you want to do there. Each country in Europe has so much to see. Are you interested in museums and castles（城堡）? Or do you want to get to know anything modem?
Cyber Boy    5-26-2013   3:02 pm
    Yoshi -- Good question. I'd like to see some museums, but I also want to try some of French famous food, and a castle would also be great.
Yoshi   5-26-2013   3:21 pm
    I think an English-France-Germany trip might work well for you. You can do a little bit of everything. That's wonderful.
Esperanto   5-26-2013   3:38pm 
    It's easier to say than to do. It will need a lot of money and take time. Cyber Boy isn't so rich. I think he'd better go to France first this time and he is still able to travel to England or Germany in the future if possible.
Yoshi   5-26-2013   3:54pm
     Esperanto --That sounds OK. But I'm not sure if he will have another trip to Europe.