CRTS1型板式轨道需对（）伤损情况进行检查。
A.轨道板
B.砂浆层
C.底座
D.伸缩缝
参考答案：A, B, C, D
试比较圆形沉箱和矩形沉箱的优缺点？
It is a rule in his family that ______ comes home earlier should cook the dinner for the family.
A．Anybody
B．who
C．who that
D．whoever
