单项选择题
A．make you think of summer B．help you visualize the cells C．show how rubber is elastic D．show how many shapes cells can have
A．the size of an elephant for comparison B．measurements C．comparisons to other flowers D．detailed descriptions of the flower’s stem
A．the situation was nothing to be concerned about B．Soufriere is still an active volcano C．crater lakes are easy to hike to D．Soufriere is a dead volcano