问题
单项选择题
按用户接收机天线在测量中所处的状态分类，GPS的定位方法可分为（）。
A.静态定位和动态定位
B.相对定位和绝对定位
C.单点定位和多点定位
D.伪距定位和差分定位
答案
参考答案：A
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按用户接收机天线在测量中所处的状态分类，GPS的定位方法可分为（）。
A.静态定位和动态定位
B.相对定位和绝对定位
C.单点定位和多点定位
D.伪距定位和差分定位
参考答案：A
| 阅读理解 | ||||||||||||
| The Scientific Method Did you ever wonder why the water level in a glass doesn't change when the ice in the glass melts (融化)? To find out why, you can use the scientific method. Used by scientists in various situations, the scientific method is also a clear and logical way to solve many real-world problems, as the procedure below indicates.
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| 1. We all know the fact that . | ||||||||||||
| A. the water level in a glass doesn't change when the ice in the glass melts B. the water level in a glass changes when the ice in the glass melts C. the water level in a glass rises when the ice in the glass melts D. the water level in a glass goes down when the ice in the glass melts | ||||||||||||
| 2. Which of the following is another good title for this passage? | ||||||||||||
| A. Research and Conclusion B. Observation and Experiment C. Follow the Steps to Find Out Why D. Mix Water with Ice and Get the Result | ||||||||||||
| 3. A hypothesis is _______. | ||||||||||||
| A. a guess about the cause of something B. the first step in the scientific method C. a conclusion about water molecules D. an experiment on ice and water | ||||||||||||
| 4. This passage suggests that _______. | ||||||||||||
| A. repeated experiments lead to the right result B. research should be done in various situations C. your hypothesis can prove your experiment results D. a logical method is needed when solving problems | ||||||||||||
| 5. The chart in the passage is useful because it _______. | ||||||||||||
| A. shows a diagram of how ice melts B. shows steps and examples C. compares water with ice D. explains cause and effect |