单项选择题

A．There are too many underdeveloped countries in the world.
B．Underdeveloped countries have low level of industrial development.
C．Different governments have different views on the question.
D．Even developed countries have complex problems.
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单项选择题
A．To correct a common misunderstanding about grasshoppers.B．To help explain how well grasshoppers can jump.C．To compare the size of grasshopper with that of other insects.D．To show how quickly grasshoppers respond to danger.
A．To correct a common misunderstanding about grasshoppers.
B．To help explain how well grasshoppers can jump.
C．To compare the size of grasshopper with that of other insects.
D．To show how quickly grasshoppers respond to danger.
单项选择题
A．How grasshoppers find food.B．How grasshoppers fight other insects.C．How grasshoppers communicate with each other.D．How grasshoppers escape from danger.
A．How grasshoppers find food.
B．How grasshoppers fight other insects.
C．How grasshoppers communicate with each other.
D．How grasshoppers escape from danger.
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