在我们一天的生活中，陆地最高气温一般出现在（　　）

一瓶未贴标签的粉末状常见金属R，为了测定R的相对原子质量，准确称取一定量金属粉末，在坩埚内加强热使其完全氧化，冷却后再称重，重复试验，获得如表数据。请回答：

（1）表格中m=　    　。

（2）该金属氧化物中，R元素和氧元素的质量比为　       。

（3）已知R的化合价为+3价，则R的相对原子质量为　        　。

根据短文理解, 从A、B、C三个选项中选择最佳答案填空。

    Paris, the capital of France, is a very special place. It's one of the Europe's 1 cities. People have lived there 2 more than 2, 000 years. Most people like it, but for different  3.

   Lovers and young people think  4 a very romantic(浪漫的) place. They like to walk 5 the Seine River(塞纳河) and drink coffee in small shops. Artists find many interesting things to 6. Tourists love shopping and visiting the famous places, 7 the Eiffel Tower and Louvre Museum. People who like 8 enjoy walking down old streets and seeing old buildings.

    In Paris, Hotels, food, and other things are 9. But there's something funny about that. In Paris, people have such a good time that they don't want to 10!

设$\sin \left(\frac{\pi .}{4}+\theta \right)=\frac{1}{3}$，则sin2θ=(   ）