x[i:j]表示引用列表x中下标从i到j-1的子列表。 numbers[0:2]输出[1,2],选项A错误; numbers [0:-1]输出[1, 2, 3, 4, 5, 6, 7, 8, 9],选项B错误; numbers[-2:]输出[9,10],选项C正确; numbers[0:3]输出[1,2,3],选项D错误。 故正确答案为C选项。
当当中国进口图书旗舰店在线销售正版《【预订】Numbers 1 2 3 [With Erasable Marker]》。最新《【预订】Numbers 1 2 3 [With Erasable Marker]》简介、书评、试读、价格、图片等相关信息,尽在DangDang.com,网购《【预订】Numbers 1 2 3 [With Erasable Marker]》,就上当
在Python中,索引可以是负数,其中-1表示最后一个元素,-2表示倒数第二个元素,以此类推。因此,对于列表`numbers = [1, 2, 3, 4]`,要访问最后一个元素,可以使用`numbers[-1]`,所以选项A是正确的。 选项B中,`numbers[last]`,这里的`last`在Python中并不是一个内建的关键字或者说具有特殊含义的标识符,...
Learn numbers and counting in English. This app teaches English language numbers up to 9,999. Listen to the app speak the numbers from 1 to 10 and higher, and p…
网易云音乐是一款专注于发现与分享的音乐产品,依托专业音乐人、DJ、好友推荐及社交功能,为用户打造全新的音乐生活。
编写一个Python函数,接收一个整数列表作为参数,返回列表中所有偶数的平均值。```pythondef average_even(numbers):evens = [x for x in numbers if x % 2 == 0]if len(evens) == 0:return 0return sum(evens) / len(evens)numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]print(a
Learn numbers and counting in English. This app teaches English language numbers up to 9,999. Listen to the app speak the numbers from 1 to 10 and higher, and p…
将数字1,2,3,4,5,8和9填入空的圆形,使每条直线上圆形内数字之和是30.(每个数字只能使用一次)Put numbers 1, 2, 3, 4, 5, 8 and
comes to writing numbers in English, there are a few additional rules to keep in mind. For example, when you're writing out a date, you would spell out the month followed by the day and year. So, you would write "July third, two thousand and twenty" instead of "7/3/...
Learn numbers and counting in English. This app teaches English language numbers up to 9,999. Listen to the app speak the numbers from 1 to 10 and higher, and practice listening and recognizing.What’s New Version History Version 1.5.3 • Internal improvements Ratings...