硅化木属于()化石。
A.不变质的遗体化石
B.变质的遗体化石
C.遗物化石
D.遗迹化石
参考答案:B
----What made her so upset?
----________.
A.Lost her bike
B.Losing her bike
C.She lost her bike
D.Because of losing her bike
查找王选撰写的论文应在检索项选择()。
A.篇名
B.关键词
C.摘要
D.作者