题干

自从央行公告第四套人名币1角硬币从2016年11月1日起只收不付后,“菊花1角”身价飞涨.一个很重要的原因是,“菊花1角”材质特殊导致日渐稀少,其使用了铝锌材质.铝、锌元素的部分信息如下,则说法正确的是(   )

A:铝比锌的金属活泼性更弱

B:相等质量的铝和锌和足量稀硫酸反应,铝产生的氢气多

C:锌原子的最外层电子数比铝多17

D:铝的相对原子质量为26.98%

上一题 下一题 0.0难度 选择题 更新时间:2019-12-26 03:01:52

答案(点此获取答案解析)

B

同类题2

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。

The benefits of keeping a journal(日志)

    If you want to grow, one important thing you should do is keep a journal. It may seem simple, but it can make a big difference in your life. I have been keeping journals for years. Writing all the lessons I learn and all the ideas I get has become a habit for me. ____ Here are some benefits you will get by keeping a journal.

♦ It prevents you from losing an idea. Have you ever gotten an idea and lost it later because you didn't write it down? ____ But then I developed the habit of writing down every idea that came into my mind as soon as possible. If I am away from my computer, I usually write it down on a piece of paper that I bring wherever I go. I will then transfer the idea to the journal in my computer.

♦ It helps you review all the lessons you've learned. By reviewing your journal, you can quickly see the lessons you've learned and the ideas you've gotten. ____ You can use the ideas to propel yourself forward.

____ After keeping a journal for years, you can look back at it and see how far you've gone. Things that were big problems in the past might seem small today. The raw ideas you had in the past have been realized today.

♦ It helps you expand your ideas. When you try to come up with a sentence to express an idea, you are thinking actively about it. ____ In the end, you will expand your ideas.

A.I often experienced that myself.

B.It trains you to express your thoughts.

C.It allows you to see your progress over time.

D.Just use whatever tool you feel comfortable with.

E.Thinking actively helps you connect your idea to another idea.

F.And to be honest, I can't imagine what my life would be like without it.

G.Then you can do whatever necessary to avoid repeating the same mistakes.