首页 试题详情
单选题

Non-gaseous substances which()naturally as pure elements,such as gold,are rare and are often highly valued.

Ahappen

Bperceive

Coccur

Dassume

正确答案:A (备注:此答案有误)

相似试题

  • 单选题

    Non-gaseous substances which()naturally as pure elements,such as gold,are rare and are often highly valued.

    答案解析

热门题库