有一个文件的文件名为“my.ab.c”,下列说法中正确的是( )。 A: 这个文件的主文件名是“my” B: 这个文件的扩展名是“ab.c” C: 这个文件可以和“MY.ab.c”文件放在同一个文件夹里 D: 这个文件是一个源程序文件

在Windows中，正确的文件名是（）。 A: ab*Bc B: A C: txt D: myName.txt E: my/Name.txt

在Windows中，下列文件名命名正确的是() A: book.txt B: ab:c C: m??.exe D: my/e

以下表达式中,正确的是( ) A: K'(MY) = c(MY) / c(M)c(Y) B: K'(MY) = [MY] / [M][Y] C: K(MY) = [MY]/ [M][Y] D: K(MY) = [M][Y]/ [MY]

My mother a doctor is my father so is A: My mother is a doctor. So is my father B: My mother is a doctor. So my father is C: My mother is a doctor. My father is so.

I had supper with my _________that evening. A: my father B: my mother C: my brother D: my grandpa

Jack, a friend of ________, often comes to see us. A: my brother and my sister B: my brother’s and my sister C: my brother and my sister’s D: my brother’s and my sister’s

_____________, they speak English. A: In my belief B: For my belief C: On my belief D: To my relief

下面比较结果为真的是______。 A: 'ab '='ab' B: ' ab'='ab' C: 'ab'='ab' D: NULL=NULL

设A、B集合,若A={Ф},B={Ф,{Ф}},则正确的是 A: AB且AB B: AB且AB C: AB且AB D: AB且AB