问题 选择题

多数自来水是采用氯气消毒的,为检验自来水中Cl的存在,最好选用下列物质中的 (  )

A.石蕊试液

B.四氯化碳

C.氢氧化钠溶液

D.硝酸银溶液

答案

答案:D

题目分析:加入硝酸银溶液,出现白色沉淀或变浑浊,说明有Cl的存在,故D正确。

阅读理解

We can make mistakes at any age. Some mistakes we make are about money. But most mistakes are about people.

Why do we go wrong about our friends? Sometimes people hide their real meanings when they say something. And if we don’t really listen, we miss the feeling behind the words. Suppose someone tells you, “You’re a lucky dog.” That’s being friendly. But “lucky dog”? There’s a bit of envy(嫉妒) in those words. Maybe he doesn’t see _it_ himself. But “lucky dog” puts you down a little. He may mean you don’t deserve your luck.

How can you tell the real meaning behind someone’s words? One way is to take a good look at the person talking. Do his words fit the way he looks? Do his words agree with the tone(语调) of voice? His posture(姿态)? The look in his eyes? Stop and think. If you spend the minute thinking about the real meaning behind one’s words, it may save another mistake.

小题1:According to the passage, the reason why we go wrong about our friends is that ______.

A.we fail to listen carefully when they talk

B.we become angry when we realize what they really mean

C.they sometimes said one thing but meant another

D.we never believe what people say小题2:What does the underlined word “it” in the second paragraph refer to(指) ?

A.Being friendly

B.A bit of envy

C.A lucky dog

D.The good luck小题3:From the passage, how many things should we pay attention to when we take a good look at the person talking?

A.Three

B.Five

C.Six

D.Four小题4:According to the passage, the writer most probably is a ______.

A.teacher

B.psychologist(心理学家)

C.farmer

D.doctor小题5:This passage is about __________.

A.how to tell the real meaning behind our words

B.what to do when you listen to others talking

C.how to avoid(避免) mistakes when communicating with people

D.why we must know the wrong we will do

单项选择题