交换机和路由器都能将从一个端口收到的数据从另外某个端口转发出去。
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n. a type of hard hat that protects the head, worn, for example, by a police officer, a soldier or a person playing some sports
A. hatred
B. gallon
C. helmet
D. infant
n. the feeling of being grateful and wanting to express your thanks
A. grain
B. gratitude
C. gravity
D. framework
adj. having the form of gas; also, lacking substance or solidity
A. ignorant
B. humble
C. hostile
D. gaseous
n. a very strong feeling of dislike for sb/sth
A. hatred
B. helmet
C. gauge
D. hedge