中国大学MOOC: There are nine mytholoigical animals on the ridges of Hall of Supreme Harmony.

There are nine mytholoigical animals on the ridges of Hall of Supreme Harmony. A: 正确 B: 错误

When separate pieces of ice collide, they will form tiny mountain ranges, which are called pressure ridges.

…or “pressure ridges” of ice that are pushed up like tiny mountain ranges when separate sheets collide. A: crush B: huddle C: hover D: crash