[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f6WWAGcO6MthHILr5QeFemqgdESgy7NCJNym_0pGNTBg":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":24,"type":25},[],"2023-06-25 20:41:03",82566764,[8,9,10,11],"输入一个自然数:13 13 ,这个数是素数的结论为: True 输入一个自然数:23 23 ,这个数是素数的结论为: True 输入一个自然数:33 33 ,这个数是素数的结论为: True 输入一个自然数:0","输入一个自然数:13 13 ,这个数是素数的结论为: True 输入一个自然数:23 23 ,这个数是素数的结论为: False 输入一个自然数:33 33 ,这个数是素数的结论为: False 输入一个自然数:0","输入一个自然数:13 13 ,这个数是素数的结论为: True 输入一个自然数:23 23 ,这个数是素数的结论为: True 输入一个自然数:33 33 ,这个数是素数的结论为: False 输入一个自然数:0","输入一个自然数:13 13 ,这个数是素数的结论为: False 输入一个自然数:23 23 ,这个数是素数的结论为: False 输入一个自然数:33 33 ,这个数是素数的结论为: False 输入一个自然数:0",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},20,"42ed9f7c0dcd38f59215ab2c522fbc1d","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0d27132e8e4c25614916fe2373258c2e.jpg","Python程序设计","work_28088406","sy07","# 本程序段有关素数问题,问如果分别依次输入13,23,33,0,则输出结果是: import math def isprime(x): myn=int(math.sqrt(x)) for k in range(2,myn+1): if x%k==0: return False return True # 永真循环,直到输入数字0结束 while True: mynum=int(eval(input("输入数字0则结束,或输入一个自然数做判断:"))) if mynum==0: break print(mynum,",这个数是素数的结论为:",isprime(mynum))",[21,26,35,43,52,61,70,79,88,97],{"answer":22,"createTime":5,"id":6,"options":23,"question":19,"source":24,"type":25},[],[8,9,10,11],"v1",0,{"answer":27,"createTime":5,"id":28,"options":29,"question":34,"source":24,"type":25},[],82566765,[30,31,32,33],"产生并输出100个素数","判断并计算100内素数的和","判断并输出100以内的所有素数的和","判断并输出100以内的所有素数","# 为本程序段的功能选择标题 import math def prime(x): n = int(math.sqrt(x)) for i in range(2, n+1): if x%i == 0: return False return True def prime_out(x): for i in range(x,1,-1): if prime(i): print("{:<6}".format(i)) return prime_out(100)",{"answer":36,"createTime":5,"id":37,"options":38,"question":42,"source":24,"type":25},[],82566766,[39,39,40,41],"1 12 234 4567","1","4567","# 读程序,选择执行结果,其中mytest.txt内容为一行数据: 1 12 234 4567,4个数据,空格分隔. def read(): ff=open("mytest.txt","rt",encoding="UTF-8",errors="ignores") s=ff.readline() st=s.split(" ") for s in st: print(s) ff.close() read()",{"answer":44,"createTime":5,"id":45,"options":46,"question":51,"source":24,"type":25},[],82566767,[47,48,49,50],"导入math库,显示math路径","导入math库,显示修改math路径","导入math库,显示math库的所有函数","导入math库,显示math函数本身的功能","# 读程序(段),选择答案(结果) import math dir(math)",{"answer":53,"createTime":5,"id":54,"options":55,"question":60,"source":24,"type":25},[],82566768,[56,57,58,59],"本程序段执行时,正常,若打开的文件不存在,创建并追加输入内容","本程序段执行时,若somefile.txt存在,则正常,若打开的文件不存在,报错","本程序段执行时,若somefile.txt存在,则正常,否则fileexistserror","本程序段执行时,若somefile.txt存在,则正常覆盖,否则fileexistserror","# 读程序(段),选择答案(结果) # 文件以文本文件方式打开 tf=open("somefile.txt","at",encoding="UTF-8",errors="ignores") mymsg=input("请输入你的内容:") tf.write(mymsg) tf.close()",{"answer":62,"createTime":5,"id":63,"options":64,"question":69,"source":24,"type":25},[],82566769,[65,66,67,68],"编译产生的目标代码可以再任何操作系统上运行","解释是将源代码逐条转换成目标代码同时逐条运行的过程","只要存在解释器,源代码可以在任何操作系统上运行,可移植性好","编译是将源代码一次性转换成目标代码的过程","下列描述错误的是()",{"answer":71,"createTime":5,"id":72,"options":73,"question":78,"source":24,"type":25},[],82566770,[74,75,76,77],"Def","el_if","_python_1","python_$_2","下面不符合 Python 语言命名规则的是()",{"answer":80,"createTime":5,"id":81,"options":82,"question":87,"source":24,"type":25},[],82566771,[83,84,85,86],"Python","Program","rogram","Progra","若 str = 'Python Program'; ,则 str[7:]表示的是()",{"answer":89,"createTime":5,"id":90,"options":91,"question":96,"source":24,"type":25},[],82566772,[92,93,94,95],"abc abc abc","abcabcabc","abc,abc,abc","a,b,c,a,b,c,a,b,c","# 读程序段,选择执行结果.下面程序执行该程序后,test.txt 文件中的内容是( ) def fun(filename): f=open(filename,"a+") f.write("abc") f.close() for i in range(3): fun("test.txt")",{"answer":98,"createTime":5,"id":99,"options":100,"question":105,"source":24,"type":25},[],82566773,[101,102,103,104],"x[i] != x[-i + 1]","x[i] != x[i - 1]","x[i] == x[-i - 1]","x[i] != x[-i - 1]","# 一个五位数,判断他是不是回文数.即 12321 是回文数,个位与万位相同,十位与千位相同. x = int(input("input a number:\\n")) x = str(x) for i in range(len(x)\u002F2): if ( ) : print ('这不是一个回文数') exit(0) print ('这是一个回文数') 问:if 后面的条件表达式应该是( )"]