下列实验能达到预期目的的是(双选) ( )。 A．将K投入NaCl溶_爱下问搜题

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问题选择题

下列实验能达到预期目的的是(双选) (　　)。

A．将K投入NaCl溶液中，比较K与Na的还原性强弱

B．用丁达尔效应鉴别Fe(OH)₃胶体和FeCl₃溶液

C．配制0.01 mol·L^－¹FeCl₂溶液后，向溶液中加入少量铁粉防氧化

D．为加快稀硫酸和锌粒反应制氢气的速率，向溶液中加入少许硝酸铜

答案

BC

A项，钾会先和水反应，不会达到预期目的；D项，加入硝酸铜后溶液中含有NO和H^＋，会生成NO气体，使制得的H₂不纯。

完形填空

Write on more than three words for each answer.
The father of Western philosophy
The word ‘philosophy’ means ‘love of wisdom’. Philosophy can be thought of as a way of looking at the world around us, or of answering the great questions of life, such as ‘Why are we here ?’ and ‘What is truth?’
The father of Western philosophy was Socrates. Socrates was from Athens, in Greece. When he was young, he was a brave soldier. Later, he became a teacher, but he taught for free, and earned his salary from being a common worker. Aside from this, we know very little about him. Since he never wrote a book, we also know very little about his philosophy. Yet, Socrates has had a deep influence on Western thought and science.
To understand how this can true, we must understand how Socrates taught. Socrates taught by asking questions. Through this, he challenged his students to develop and explain their own arguments. In many cases, his questions made his students aware of their own errors. Many students got embarrassed and even angry when this happened, while others changed their opinions. Socrates’ way of approaching the truth is now called the Socratic Methods. The idea of asking questions until you reach the right answer is the basis of modern philosophy and science.
Unfortunately for him, Socrates questioned too much. He always asked challenging questions to everyone he met, upsetting many people in Athens. Finally, some people had had enough of him, so they took him to court for questioning the existence of the Greek’s Gods and for corrupting the young people of Athens. At his trial, he defended himself by asking his judges yet more questions. This just made a bad situation worse. Finally he was put to death by being forced to drink poison. Through his death, Socrates became the hero of all people who search for the truth.

The Father of Western philosophy
The `小题1:` of philosophy	Philosophy can be `小题2:` as a way of looking at the world around us, or of answering the great questions of life.
Brief introduction to Socrates	Socrates was `小题3:` Athens. He was a brave soldier when he was young. Later, he worked as a teacher who taught `小题4:` and earned his salary from being a common worker.
Socratic Method	Socrates taught by `小题5:` . Through this, he challenged his students to develop and explain their own arguments to make the students aware of their own errors. His way of `小题6:` he truth is now called the Socratic Method.
`小题7:` for Socrates’ death	Socrates always liked asking `小题8:` questions to everyone, which upset many people in Athens, so they took him to `小题9:` for questioning the existence of the Greek gods and for corrupting the young people. `小题10:` , he was put to death by being forced to drink poison. However, he became the hero of all people who search for the truth.

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