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【单选题】
以下哪一类IP地址标识的主机数量最多？A.
A 类
B.
D 类
C.
C 类
D.
B 类
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举一反三
【单选题】We learn from the last paragraph that______.
A.
a baby dinosaur looks like a bird
B.
T-rex is a kind of dinosaur figure familiar to kids
C.
living feathered dinosaurs can still be found in certain parts of the world
D.
scientists understand precisely how and why feathers first arose
【单选题】Why is one of the sinkholes called "watch out for dinosaurs"?
A.
dinosaur bones were found there
B.
the area seemed like a different world
【单选题】Why is one of the sink holes called 'Watch out for dinosaurs"?
A.
a. Dinosaur bones were found there.
B.
The area seemed like a different world
【单选题】Why does the documentary mention dinosaurs?
A.
Dinosaurs are belived to be the ancestor of human.
B.
There are still living dinosaurs on earth.
C.
To find the coelacanth is like finding a dinosaur still alive.
D.
Dinosaurs caused the extinction of some fishes.
【单选题】Have you found out the exact reason why the dinosaur _________ many years ago?
A.
died down
B.
died out
C.
died from
D.
died of
【多选题】小组工作维持阶段中,组员关系走向亲密化,小组内部权力竞争开始。此时,社会工作者的工作重点是( )
A.
增强组员对小组的认同感
B.
处理小组冲突
C.
形成稳定的小组关系结构
D.
协助组员把认知转换为行动
【简答题】在相同的冷却条件下，一级节流循环要比二级节流循环的制冷系数小，为什么目前采用一级节流循环形式的较多？
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