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问题 选择题

每周四下午第三四节课，是某学校自由活动时间，在校园西侧，男女同学出现了这样的“交往风景”。你认为属于正常交往的有[ ]

①男女同学在一起学跳校园集体舞

②女同学为本班参加篮球比赛的同学加油助威

③在校园角落里一对男女同学在“单独交流”

④男同学拿“恐怖玩具”和女生开玩笑

A．①③

B．②③

C．①②

D．③④

答案

答案：C

选择题

中国近代史上的一个中外条约记载“二、自今以后，大皇帝恩准大英国人民带同所属家眷，寄居大清沿海之广州、福州、厦门、宁波、上海等五处港口，贸易通商无碍。且大英君主派设领事、管事等官住该五处城邑，专理商贾事宜……”。据此判断，该条约是

A．《南京条约》

B．《虎门条约》

C．《马关条约》

D．《辛丑条约》
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阅读理解
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.
Steps in the Scientific
Method		Examples
State the problem or
question.		"Why doesn't the water level in a glass rise when ice melts?"
Collect information about the problem,
using your own
observations and
research. 		You already know that ice is frozen water. From your research,
you learn that water and ice are made of water molecules (分子).
Form a hypothesis,
or a best
guess based on the
information. 		"The molecules in water appear to be closer together than they are
in ice."
Test the hypothesis by doing an experiment.Fill four glasses with ice. Then pour water over the ice and fill
each glass to the rim. As the ice melts, you observe that the water
does not spill over the top of the glasses. Each time you repeat the experiment, you get the same results.
Draw a conclusion
based on your
results. 		Molecules are closer together in water than they are in ice.
1. 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
2. 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
3. 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
4. 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
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