多项选择题
A.seismic upheaval B.earthquake C.glaciation D.grits in Colorado river
UNESCO designated Redwood National Park a world heritag...
判断题UNESCO designated Redwood National Park a world heritage site because of its rare ecosystem and cultural history.
How deep is the Grand Canyon?（）A.1 kilometerB.1 mileC.1...
单项选择题How deep is the Grand Canyon?（）
A.1 kilometer B.1 mile C.18 kilometers D.18 miles
Conjure up means（）。A.阻断B.幻想C.连接D.跳出
单项选择题Conjure up means（）。
A.阻断 B.幻想 C.连接 D.跳出
