实际长100厘米的线段在图纸上只用1厘米表示。这幅图的比例尺是（ ）。
1：100
With so many problems____ , the newly-elected president had a hard time.
A．settled
B．to settle
C．being settled
D．was settled
下面四幅图描述的情景中属于动能转化为重力势能的是
