18是倍数,6是约数。[ ]
错误
无论网站是以何种方式创建,网站必须要有()。
A.网址
B.域名
C.网址和域名
D.logo
Questions and exercises are given by the computer, which decides ______ to move the students ahead, review an easier level, ____ give more work on the same level.
A.either, or
B.both, and .
C.whether, or
D.not only, but also