相邻工作段的分段位置，宜设在（）
A、伸缩缝
B、沉降缝
C、防震缝
D、构造柱
E、门窗洞口
参考答案：A, B, C, D, E
已知一个等腰梯形的下底与上底之差等于一腰长，则这个等腰梯形中的较小的角的度数为
A.30°
B.60°
C.45°
D.75°
—Why was the boy beaten by his father?
—He _____ to his father that he had _____the table.
A．lain/lay
B．laid/lied
C．lied/laid
D．lay/laid
