同时能被3，4，5整除的最小四位数是______．

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问题解答题

答案

能被2整除的数是个位上是0、2、4、6、8的数，

能被5整除的数是个位上是0或5的数，

满足能被4、5整除的个位上只能是0，

要求是最小的四位数，

那么最高位只能是1，百位上是0，

那么十位上是几，就要满足能被3整除，

这个四位数各个数位上的数加起来的和应最小是3，

3-1-0-0=2，十位上是2，

这个四位数是1020．

故答案为：1020．

单项选择题

CAXA制造工程师中，如要改变“轮廓线精加工”的轮廓线，则要进入（）对话框后才可以修改的。

A、在“几何元素”上双击

B、在“加工轨迹”上双击

C、在“加工参数”上双击

D、在“铣刀”上双击

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单项选择题

It has been argued by some that gifted children should be grouped in special classes. The (31) has been on the belief that in regular classes these children are held back in their intellectual (智力的) growth by learning situation that has designed for the (32) children.

There can be little doubt that (33) classes can help the gifted children to graduate earlier and take their place in life sooner. However, to take these (34) out of the regular classes may create serious problems.

I observed a number of intelligent children who were taken out of a special class and placed in a regular class. In the special class, they showed little ability to use their own judgment, relying (35) on their teachers’ directions. In the regular class, having no worry about keeping up, they began to reflect voluntarily on many problems, some of which were not on the school program.

Many are concerned that gifted children become (36) and lose interest in learning. However, this (37) is more often from parents and teachers than from students, and some of these (38) simply conclude that special classes should be set up for those who are (39) . Some top students do feel bored in class, but why they (40) so goes far beyond the work they have in school. Studies have shown that to be bored is to be anxious. The gifted child whop is bored is an anxious child.

33（）

A.regular

B.special

C.small

D.creative

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