问题
单项选择题
某位移测点，加载前读数为2.1mm，加载达到稳定时读数为10.8mm，卸载后达到稳定时读数为3.2mm，则其残余位移为( )
A．1.1mm
B．3.2mm
C．5.5mm
D．2.1mm
答案
参考答案：A
解析： 残余位移为：3.2-2.1＝1.1
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某位移测点，加载前读数为2.1mm，加载达到稳定时读数为10.8mm，卸载后达到稳定时读数为3.2mm，则其残余位移为( )
A．1.1mm
B．3.2mm
C．5.5mm
D．2.1mm
参考答案：A
解析： 残余位移为：3.2-2.1＝1.1
| 阅读理解。 | |
| My family and I have ridden bikes around the island several times. My friends often ask me questions about biking with their families. I'm sorry to learn that some of them don't really enjoy biking or get hurt on the road because they don't prepare well. Here I want to share some things that I think are important before you start off:
| |
| 1. What is the writer talking about? | |
| A. How to fix a bike on the road. B. How to save money on a bike ride. C. Things to do for a safe and happy bike ride. D. Things to remember when you get hurt on the road. | |
| 2. Which is said in the reading? | |
| A. Biking is good for health. B. More and more people go to work by bike. C. Biking around the island is getting popular. D. The size of the bike is important for biking. |