【单选题】The United States is well-known for its network of major highways de signed to help a driver get from one place to another in the shortest possible time.【C1】______ these wide modern roads are generall...
【简答题】Every year landslides cause 25 to 50 deaths and $2 billion in damage in the United States. And in December, a single killed more than 2000 people in the Philippines. Sending workers to stabilize...