问题
单项选择题
所谓“完全弹性体”是指( )。
A．(A) 材料应力应变关系满足胡克定律
B．(B) 应力应变关系满足线性弹性关系
C．(C) 本构关系为非线性弹性关系
D．(D) 材料的应力应变关系与加载时间历史无关
答案
参考答案：D
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所谓“完全弹性体”是指( )。
A．(A) 材料应力应变关系满足胡克定律
B．(B) 应力应变关系满足线性弹性关系
C．(C) 本构关系为非线性弹性关系
D．(D) 材料的应力应变关系与加载时间历史无关
参考答案：D
| 阅读理解。 | |
| Come and see the Indian elephants and the new tigers from America. The monkeys are waiting to meet you, and the pandas from China are waiting to take pictures with you. The lovely koalas from Australia are waiting to laugh at you, and the giraffes from Africa are waiting to look down on you. The parrots want to speak to you!
| |
| 1. How many kinds of animals are talked about in the passage? | |
| A. Four. B. Five. C. Six. D. Seven. | |
| 2. Two brothers, one aged 14 and the other 10, with their parents go to the zoo, how much are the tickets together? | |
| A . $9.00 B. $10.00 C. $11.00 D. $12.00 | |
| 3. Which of the following is the visiting time? | |
| A. 8:30 a.m. Monday B. 9:30 a.m. Friday C. 5:00 p.m. Tuesday D. 7:00 a.m. Sunday | |
| 4. From the passage we can guess the animal "giraffe" must be very ______. A. fat B. long C. tall D. strong | |
| 5. What can we do in the zoo? | |
| A. To take some nice photos. B. To give some bananas to the elephants. C. To touch the monkeys. D. To throw things everywhere. |