题干

在实验室中用锌、氧化铜、稀硫酸作原料,采取下列两条途径制取铜:
①ZnH2Cu
②CuOCuSO4Cu
若用这两种方法制得铜的质量相等,则下列叙述符合实际实验结果的是

A:一定消耗相同质量的氧化铜

B:一定消耗相同质量的锌

C:一定消耗相同质量的稀硫酸

D:一定生成相同质量的硫酸锌

上一题 下一题 0.0难度 选择题 更新时间:2017-03-06 10:46:51

答案(点此获取答案解析)

A

同类题1

阅读理解

    Differences are important and they should be respected. For example, many important people throughout history were considered different, such as Thomas Edison, Albert Einstein and Abraham Lincoln. They did great things, but some people thought they were strange because they had strong feelings about something. I can understand these people because I've been in that situation before many times.

    It all started in elementary school when I realized that I wasn't like everyone else. My mom says that I have a tendency to be obsessed(着迷)with certain subjects. Unfortunately, these subjects don't interest other kids of my age and they really don't interest my teachers. In fact, my kindergarten teacher said she would scream if I mentioned snakes or lizards one more time while she was teaching the days of the week. I would get into trouble for not paying attention and the teasing began.

    In the third grade, my teacher informed me that I have Asperger's Syndrome(症状). I said, “So what? Do you know that Godzilla's suit weighs 188 pounds?”

    Later, I asked my mom, “What's Asperger's Syndrome? Am I gonna die?” She said that it's like having blinders on, and that I can only see one thing at a time, and that it's hard to focus on other things.

    People also make fun of me for knowing facts about volcanoes, whales, tornadoes and many other scientific things. My mom says that she has been able to answer many questions on Jeopardy! just by listening to what I have to say, but I've even been laughed at for being smart.

    Maybe someday I'll become a gene engineer and create the real Godzilla. I can dream, Can't I?