单项选择题

A．They are newer than the formations in most caves.
B．They were formed by sulfuric acid.
C．They have been artificially preserved.
D．They are smaller than those in any other cave.
<上一题 目录 下一题>
热门 试题

单项选择题
A．It warns young people of the hardships of a successful writer.B．It advises young people to give up their idea of becoming writers.C．It shows that writers usually live in poverty and isolation.D．It encourages young people to pursue a writing career.
A．It warns young people of the hardships of a successful writer.
B．It advises young people to give up their idea of becoming writers.
C．It shows that writers usually live in poverty and isolation.
D．It encourages young people to pursue a writing career.
填空题
demonstrates
相关试题