题目

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 If you travel, you will leave a carbonfootprint in your wake. You can't help it. But eco-friendly travel practicescan lighten the harm on Mother Earth. Green travel is not a passing trend but alifestyle choice. . Choosing a green destination No destination is a Green Giant. . However, some countries and citiesshow a deep commitment to Earth-friendly policies and practices. Whenresearching a vacation spot, look for places that naturally embrace the greenlifestyle. Choosing7．某种晶体熔液温度随时间变化曲线如图所示．试分析：（1）这是熔化图象还是凝固图象？凝固图象；（2）这种晶体的熔点是多少？0℃；（3）这种物质液态时是什么名称？水；（4）凝固的时间有几分钟？4min；（5）第5分钟时处于固液共存态．