题干

古印度人提出了“0”的理论和作为演算基点的十进制。有了十进制,需要的单数仅为0,1,2,……,9.印度的这一贡献是很突出的,可与轮子、杠杆或字母表这些发明相媲美。把古印度人的这项发明加以改造并传播到欧洲的是(    )

A:古埃及人

B:古希腊人

C:阿拉伯人

D:印度人

上一题 下一题 0.0难度 选择题 更新时间:2019-11-19 01:16:25

答案(点此获取答案解析)

C

同类题2

阅读下面短文,从短文后各题所给的四个选项(A、 B 、C 、D)中,选出可以填入空白处的最佳选项。

    One month ago, my daughter started kindergarten. As usual, I wished her success. I was telling a lie. What I actually wish for her is 1. I believe in the power of failure.

    Success is 2 in a sense. Success is proving that you can do something that you already know you can do, or doing something correctly the first time, which can 3 be a problematic victory. First-time success is usually a fluke (侥幸). First-time failure, 4, is expected; it is the natural order of things.

    Failure is how we learn. I have been told of an African phrase 5 a good cook as “she who has broken many pots”. If you have spent enough time in the 6 to have broken a lot of pots, probably you know a fair amount about 7. I once had a late dinner with a group of chefs, and they spent time 8 knife wounds and burn scars. They knew how much credibility (可信度) their 9 gave them.

    I earn my 10 by writing a daily newspaper column. Each week I am 11 that one column is going to be the worst column of the week. I don't just set out to write it; I try my best every day. 12, every week, one column is inferior (较差的) to the others, sometimes extremely so.

    I have learned to 13 that column. A successful column usually means that I am treading (踏) on 14 ground, going with tricks that work, or dressing up popular ideas in fancy words. Often in my inferior columns, I am trying to 15 something I've never done before, something that I'm not even sure can be done.

    My daughter is a perfectionist. She will feel her failures, and I will want to 16 her. But I will also, I hope, 17 her of what she learned, and how she can do 18 next time. I probably won't tell her that failure is a good thing, because that's not a(n) 19 you can learn when you're five. I hope I can tell her, though, that it's not the end of the world. Indeed, with luck, it is the 20.