【判断题】【消耗次数：1】
桁架中的零力杆既然不受力，在实际结构中可以去掉。()
①
正确
②
错误
参考答案：
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相关题目
【多选题】
对于在弹性范围内受力的拉（压）杆，以下说法中，（ ）是正确的。
①
长度相同、受力相同的杆件，抗拉（压）刚度越大，轴向变形越小
②
材料相同的杆件，正应力越大，轴向正应变也越大
③
杆件受力相同，横截面面积相同但形状不同，其横截面上轴力相等
④
正应力是由于杆件所受外力引起的，故只要所受外力相同，正应力也相同
⑤
E质地相同的杆件，应力越大，应变也越大
随机题目
【单选题】
A: Well, its time for us to go. B: [填空].
①
Nice to meet you
②
Have a nice day
③
I wish you a pleasant journey
④
I hope you will soon feel better
【单选题】
A: I need to buy a wedding gift for Jane. B: Should we stop at the shopping center? A: [填空]. The weddings not until next week, but I wont have time later to get them anything.
①
Wont be necessary
②
Its your call
③
I suppose so
④
If you insist
【单选题】
A: Its a long journey. You look tired. [填空]? B: Yes. Could you take that suitcase, please? A: Sure.
①
Wheres your luggage
②
How can I help you
③
Do you mind my help
④
May I help you with anything
【单选题】
A: Are you ready for the test tomorrow? B: [填空] A: Come on, I am sure you will do well.
①
Why do you ask?
②
No. Im afraid not.
③
Sure, no problem.
④
What about you?
【单选题】
A: Do I have the pleasure to buy you a drink? B:[填空].
①
Its your pleasure
②
Its very kind of you
③
Youre too nice to me
④
You spend money again
【单选题】
A:Happy birthday! Heres a gift for you. B: [填空].
①
Thats good. How much is it?
②
Wow, it is great! Thank you.
③
It must be very expensive.
④
You shouldnt have bought it.
【单选题】
A: Are you following me? B: [填空]
①
Can you walk slowly, please?
②
Let me think of it.
③
Im afraid not.
④
Who knows?
【单选题】
A: This meal is on me. [填空]. B: Thanks, but isnt it my turn to treat you?
①
Its none of your business
②
Ill treat you
③
My pleasure
④
I invite you
【单选题】
A: If things go on like this, we shall destroy ourselves. B: [填空]
①
Really? Congratulations!
②
Come on. Its not that bad.
③
Yes, you are good at it.
④
Its none of my business.
【单选题】
A: I got a job from Dell B: Thats great news. Im very happy for you. A: Thanks. I feel like celebrating. Lets go have a beer. [填空].
①
Its on me
②
Its so fine today
③
Its your turn
④
It is rather expensive