问题
单项选择题
三铰拱的合理拱轴线为（）。
A.任意荷载下均为合理轴线
B.确定荷载下且跨度给定时为合理轴线
C.合理轴线的跨度可以任意
D.合理轴线时弯矩为零，但剪力不—定为零
答案
参考答案：B
解析：
三铰拱的合理拱轴线是在确定荷载给定跨度下计算出来的，因此正确答案为(B) 。
搜题请搜索小程序“爱下问搜题”
三铰拱的合理拱轴线为（）。
A.任意荷载下均为合理轴线
B.确定荷载下且跨度给定时为合理轴线
C.合理轴线的跨度可以任意
D.合理轴线时弯矩为零，但剪力不—定为零
参考答案：B
解析：
三铰拱的合理拱轴线是在确定荷载给定跨度下计算出来的，因此正确答案为(B) 。
| 阅读短文，判断句子正(T)误(F)。 | |
Chinese team. The football match is going to be over at six o'clock in the afternoon. Our teachers, Mr Li and Mr Wang, are going to watch the football match with us. We are going there by bus. We think we can come back at about eight in the evening. ( ) 1. There is a football match between a Chinese team and a Japanese team. ( ) 2. The match will be over at four o'clock in the afternoon. ( ) 3. We are going there by train. ( ) 4. Mr Li and Mrs Li are going to watch the match with us. ( ) 5. We will come back at about seven in the evening. |