关于英语单词的选择题：
1.The plane quickly lost__a___.
A.altitudeB.height C.level D.tallness
这句话怎么翻译
2.A phenomenon is __D___ if it has elements that stimulate ones curiosity,and make it difficult to explain it.
A.odd B.curious C.unknown D.strange
怎样区分a与d呢 并翻译下这个句子