题目

我们所研究的一些物质有着广泛的用途，下列关于物质用途的叙述不正确的是（   ） A．二氧化碳用于灭火 B．高锰酸钾用作实验室制取氧气的原料 C．氧气用作火箭的燃料 D．氩气用作焊接金属时的保护气 答案：C“People are ruder today because they are rushed and more ‘time poor’ than ever before,” says Patsy Rowe, “ Manners have fallen off the radar(雷达).” Due to our strong attraction to electronic equipment, it is a wonder that more people don’t wake up each morning and greet the singing birds with complaining about the noise. Here are some examples of rudeness.Some people prefer to do almost everything over the Internet. To them, dealing with an actual human is like an evolutionary step backward. It feels very slow because humans don’t work at 4G speeds. When you have dinner with friends, you will often notice someone paying more attention to his mobile phone. We have programmed ourselves to think that every new message brings life-changing news, so taking calls and checking our texts are more important than talking to the people we are with. What is worse, some people even tend to send anonymous（匿名的）rude messages by email.However, rudeness is never acceptable. Don’t assume it is OK to be rude if the person you’re in touch with won’t recognize you. If you have something awful to say, have the courage to face the person and say it, write a letter or email and sign it, or forget it. Upsetting people with unsigned messages is cruel and disgusting.We shouldn’t blame technology for our shortcomings. Technology is here to help us, but we should not allow it to take over our lives. An important step is acknowledging our shortcomings. People spend a lot of time pointing out bad manners but it would be even more helpful if we’d publicly acknowledge good manners when we see them.【1】What can be inferred from the underlined sentence in Paragraph 1?A. People can tell good from bad behavior.B. People care little about their behavior.C. Radar is able to observe human behavior.D. Radar can be used to predict human behavior.【2】Some people are less willing to deal with humans because______.A. they are becoming less patientB. they are growing too independentC. they have to handle many important messagesD. they have to follow an evolutionary step backward.【3】The author thinks sending unsigned awful messages is ______.A. Ridiculous B. acceptable C. disgusting D. reasonable【4】What can we learn from the last paragraph?A. Technology can never be blamedB. We should applaud good behavior.C. We should keep pointing out mistakes.D. Technology will take over lives one day.