问题
单项选择题
单层厂房横向地震作用计算时，其自振周期是按铰接排架简图进行，但实际自振周期是（）的，因此需要调整。
A.偏大
B.不变
C.偏小
D.有时偏大，有时偏小
答案
参考答案：A
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单层厂房横向地震作用计算时，其自振周期是按铰接排架简图进行，但实际自振周期是（）的，因此需要调整。
A.偏大
B.不变
C.偏小
D.有时偏大，有时偏小
参考答案：A
请阅读下列短文。根据短文内容从下面方框的七个选项中，选择五个适当的句子还原到原文中，使短文意思通顺、结构完整，并将其答案填写到相应位置。 Dale is a middle school student. 小题1: His home is about 18 kilometers from school and the roads (道路) are not flat (平坦的). 小题2: He gets up at about 6:00 every morning and has breakfast quickly. 小题3: First, he walks to the bus stop, It takes it to school. 小题4: Sometimes he has no time for breakfast at home, so he has some milk and bread for breakfast on the bus. He hopes he can go to college (大学) after middle school. 小题5:
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