在△ABC中，若 $AB\text{=}\sqrt{13}$ ,BC=3， $\angle C={120}^{\circ }$ ,则AC=(  )

以下民族精神涌现的时间与其他三个不同是                                 （  ） 

阅读理解

    Body language is an important part of communication(交流). If you want to communicate well, it's important to understand how you can (and can't) use your body to say what you mean, especially when you're in a foreign country. If a person is bored, he won't look at the person who is talking to him. He will find other things to do. He may also keep looking at his watch or a clock. If a person is open to you, his arms and legs will not be crossed. And if a person is relaxed, you will know it by looking at his body, even his breathing is slower.

Here are some examples of body language:

Body language	Feeling
Sitting with legs crossed	Bored
Sitting with legs apart	Open, relaxed
Walking with hands in pockets, head down	Sad
Hand to cheek	Thinking things in hands
clasped (握紧) behind back	Angry

上海世博会上最受欢迎的中国馆，处处蕴含着“低碳”理念。下列做法不符合该理念的是(     )

一名从事农村工作的干部路遇一果农。果农问他一天吃几个苹果，他回答“一个就够了”。果农说，都说苹果能赚钱，可不管我们种多少，你们城里人每天总是吃一个，提高产量卖给谁啊？这位干部回答说，如果用3个苹果榨出1杯果汁，每人早晚各喝一杯没问题，一天就能吃6个苹果了。这一对话主要启示农民增收需要                                               （   ）
①提高农产品的附加值           ②积极发展食品加工业
③大力种植经济作物             ④发展农业产业化经营