题目

超级素数是指一个素数，每次去掉最后面的一个数字，依然为素数。如 37，去掉最后的7 后，3 仍为素数。统计 1000 以内的超级素数的个数的 VB 程序段如下： For i = 2 To 1000 flag = True：s = iDo While flag And s >1 For j = 2 To Int(Sqr(s)) If s Mod j = 0 Then Exit ForEnd If Next jLoopIf flag And s<>1 ThenEnd IfNext i Label1.caption=str(c) 上述程序段中方框处可选语句为： ①flag = False②c = c + 1③s = s \ 10 则（1）（2）（3）处语句依次可为（ ） A . ①②③ B . ②①③ C . ③②① D . 用括号中所给词的适当形式填空，使语篇意思完整，必要时请用否定式。 I'll tell you the story of Jimmy，the Bike Boy．Last week everyone was trying to cheer him up． 1 （but）this week，Jimmy is   2  （happily）again．On Monday，he told a radio 3   （interview） that he had run out of money to buy old bikes．He also put up some signs  4  （ask） for old bikes and called up all his friends and told   5  （they） about the problem．He even handed out the advertisements at a local supermarket．Then he told the  6   （teacher）at school about his problem and they set up a call-in center for parents．The strategies that he came up with worked out   7   （ fine ）．He now has  8  （ sixteenth）bikes to fix up and give them to some children．Because those children are very poor and they  9  （have）enough money．He gets  10  （lot）of practice and he also has fun．