题目

America’s Living Natural History Museum ●On March 1, 1872, Yellowstone became the first national park for all to enjoy the unique hydrothermal wonders. As development spread across the West, the 2.2 million acres of habitat within the park became an important sanctuary for the largest concentration of wildlife in the lower 48 states. ☆Things you can do ●An amazing experience awaits you here. Yellowstone is a seasonal park, so plan your visit by learning about the current conditions, operating seasons and hours, road conditions, lodging and eating options, and available activiti下列能组成一个经线圈的是（　　）A．20°E和160°EB．0°C．180°D．20°W和160°E