按网络所覆盖的地域范围可把计算机网络分为广域网、城域网和局域网。校园网一般属于()网。
参考答案:局域
It is exactly ______he often fails in the exam ______ makes his parents worried about him.
A.what; that
B.that; which
C.that; that
D.what; what
有两瓶从外观无法区别的“水”,其中一瓶是硬水,一瓶是软水,区别它们的最简便方法是加入肥皂水、振荡,有较多泡沫的是________水。