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【单选题】
如图所示,( a )、( b )为两种结构,则()。A.
图（ a ）、（ b ）不定的；
B.
图（ a ）、（ b ）定的
C.
仅图（ a ） 是静定的
D.
仅图 （ b ）是静定的
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【单选题】Every habitat in the world, from volcano tops to icebergs, can support some sort of life.
A.
country
B.
environment
C.
food source
D.
practice
【单选题】Every habitat in the world from volcano tops to icebergs can support some sort of life.
A.
Country
B.
Environment
C.
Food source
D.
Practice
【简答题】语法填空Animals can become enered for a number of reasons,but many experts believe that loss of habitat is the main cause.Some animals are put 1. ____er when people take over their habitats.This o...
【单选题】Every habitat in the world, from volcano tops to icebergs, can support some sort of life. Habitat means _______
A.
country
B.
environment
C.
food source
D.
practice
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