问题
单项选择题
1980年5月在日内瓦召开的联合国国际多式联运公约会议上产生的《联合国国际多式联运公约》已在（）个国家批准。
A.20
B.30
C.50
D.100
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
1980年5月在日内瓦召开的联合国国际多式联运公约会议上产生的《联合国国际多式联运公约》已在（）个国家批准。
A.20
B.30
C.50
D.100
参考答案：B
| 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.
| ||||||||||||
| 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 |