A) Because people regard it as a kind of cute and fluffy animal.B) Because people should not neglect the ugly and endangered animals.C) Because people do not know what a blobfish is.D) Because many people are against using cute animals.
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A) Seaweed. B) Jelly.C) Shellfish and small crabs. D) Shrimps.
A) Because people like eating them.B) Because fishermen like catching them.C) Because they can’t find enough food.D) Because they get killed accidentally.
计算机网络从逻辑及功能上分为______子网和_______子网,用户主机属于______子网。
计算机网络按其地理覆盖范围可分为三类:______、______和______。从逻辑功能上,可分为两级子网,即_______和________。按网络传输技术分为_______和点到点式网络。