单项选择题

A．Income affects happiness very much.
B．Income affects happiness very little.
C．Happiness affects income very much.
D．Happiness affects income very little.
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单项选择题
A．To determine whether the Earth’s temperature is going up.B．To study the behavior of some sea animals.C．To measure the depth of the ocean.D．To measure the movement of the ocean.
A．To determine whether the Earth’s temperature is going up.
B．To study the behavior of some sea animals.
C．To measure the depth of the ocean.
D．To measure the movement of the ocean.
单项选择题
A．A teacher of economics.B．A professor of studying happiness.C．A consultant on economic affairs.D．A specialist in political science.
A．A teacher of economics.
B．A professor of studying happiness.
C．A consultant on economic affairs.
D．A specialist in political science.
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