①一立方英寸被压扁的沙子比一立方英寸普通的沙子要重得多。____
②因此,目前存在两种对立的理论,即“撞击说”和“火山说”。____
1519﹣1522年,葡萄牙航海家麦哲伦率领船队从西班牙出发首次完成环球航行,用事实证明了地球是球形的,读麦哲伦环球航行路线图,回答下列问题.
To persuade drivers to ____checking their phones whenever they beep, the New York state plans to introduce so-called Texting Zones along its major highways to make sure of the drivers' safety.