【单选题】【消耗次数：1】
采用（ ）作为拱轴线的空腹式拱桥，一般采用“五点重合法”来确定其拱轴系数。
①
圆弧线
②
悬链线
③
二次抛物线
④
高次抛物线
参考答案：
复制
纠错
相关题目
【填空题】
设抛物线y=x2＋(a＋1)x＋a.其中a为实数.(1)若抛物线经过点(－1，m)，则m＝[填空1](2)将抛物线y=x2＋(a＋1)x＋a向上平移2个单位，所得抛物线顶点的纵坐标的最大值是[填空2]
【单选题】
对称抛物线三铰拱在满跨竖向均布荷载作用下，其截面内力特点是（ ）。
①
弯矩=0.剪力=0，轴力≠0
②
弯矩=0，剪力≠0，轴力≠0
③
弯矩≠0，剪力=0，轴力=0
④
弯矩≠0，剪力≠0，轴力≠0
【单选题】
已知点P是抛物线y2＝2x上的一个动点，则点P到点(0,2)的距离与点P到该抛物线准线的距离之和的最小值为( )
①
<img src=http://huaweicloudobs.ahjxjy.cn/23a5f562d8a1c70e4c3ba7cef20e2bf6.png/>
②
3
③
<img src=http://huaweicloudobs.ahjxjy.cn/99ea9464a2efc4120ae1f33bf21b050b.png/>
④
4.5
随机题目
【单选题】
A: Smoking is forbidden in the workshop, please stop it. B: Sorry, [填空].
①
I am not sure
②
I have no idea
③
I do know
④
I did not know
【单选题】
A: I feel quite sick, doctor. B: [填空] A: Im not sure, but I have got a bad headache.
①
How long have you been sick?
②
Im sorry to hear that
③
How are you feeling now?
④
Do you have a fever?
【单选题】
A: How soon will your parents fly to Beijing? B: [填空].
①
At 8:00 am
②
Yesterday
③
In three hours
④
Once a month
【单选题】
A: [填空] when you cross the street. Theres so much traffic. B: Yes, I will.
①
Be careful
②
Take care
③
Care about
④
Look out
【单选题】
A: Sorry to bother you. B: [填空].
①
Thats okay
②
No, you cant
③
Thats good
④
Dont mention it
【单选题】
A: Must I take a train? B: No, you [填空]. You can take a plane.
①
dont
②
must not
③
dont have to
④
can not
【单选题】
A: Dont worry. Ill leave the message on his desk. B: [填空].
①
Thats great
②
Thats great idea
③
Thank goodness
④
Its kind of you
【单选题】
A: May I help you, madam? B: [填空].
①
Thats very kind of you
②
You are very nice
③
Youd better give me a hand
④
Yes, Id like a kilo of apples
【单选题】
A: I didnt mean to do that. Please forgive me. B: [填空].
①
You are wrong
②
You are welcome
③
Thats all right
④
Thats OK
【单选题】
A: How do you do? B: [填空]
①
Fine, thank you.
②
How do you do?
③
Not too bad.
④
Very well.