Why the explosion occurred was________ the laboratory attendant hadbeen careless.
A. for
B. because
C. since
D. that
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Mary: Helen is a mere washer woman, yet she's now buying a big houseCarol: Yes. Because she's always saved ________.
A. what little she earns
B. how little she earns
C. for little she earns
D. with little she earns
二层交换机不是一个即插即用的设备,需要配置才能使用。
A. 对
B. 错
默认路由是一种特殊的动态路由。
A. 对
B. 错
子网和VLAN是一个概念,可以混在一起用。
A. 对
B. 错