⑴温度计的温度为____。

⑵小球的直径是____。

⑶石块的体积是____。

图中长方形代表亚欧大陆，圆形代表中国，能正确反映中国位置的是（    ）

步骤一：连接A和B，打开活塞，通入空气．

步骤二：关闭活塞，连上C和D，开始加热．

步骤三：在加热过程中，记录B中固体质量变化如下表，在t₃时停止加热．

   Some people don’t like doing sports because they think it is hard work and will make____ (他们) feel tired . That’s wrong! Sports help us to____ (保持)healthy , happy and live longer .If you____ (从不) do sports , you will get unhealthy easily . Sports are____ (也)a good way to make friends .People from different____ (地方) may not know each other , but after a game , they often become good friends .And sports in winter and ____ (夏天)are not the same.____ __(swim) is fun in hot weather , while skiing is great____ cold days . Many people____ (享受) watching others play games .They often get very____ (兴奋) when “their” players or teams win .