在Word2003中，域代码和开关之间使用（）进行分隔。
A、*
B、~
C、%
D、空格
参考答案：D
一个分子为x﹣5的分式，在x≠1时有意义，请写出一个符合上述条件的分式（ ）。
改错。
( )1. Did you enjoy you yesterday, my children? ________
A B C D
( )2. He taught his son how mend bikes. ________
( )3. It's very hot outside or it's cool here in the room. ________
( )4. Let me to help you look for your ruler. ________
( )5. Our teacher said the earth went round the sun. ________
