在IP地址×××.×××.×××.×××中，每段的取值范围是（）

A:1—2554 B:1—256 C:0—255 D:0—256

=（）。

A:A B:B C:C D:D

计算的值（）

A:A B:B C:C D:D

求不含质数的1到100的偶数的和是多少( )

A:2540 B:2548 C:2550 D:2554

从所给的四个图形的规律，选择最合适的一个（）.

A:A B:B C:C D:D

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Directions: Write an essay of 160-200 words based on the following drawing. In your essay, you should 1) describe the drawing briefly, 2) explain its intended meaning, and then 3) give your comments. You should write neatly on ANSWER SHEET 2.