单项选择题

A．To measure amounts of rainfall.
B．To check the accuracy of scales.
C．To observe changes in the atmosphere.
D．To calculate the density of other metals.
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单项选择题
A．Because she might get a good job later.B．Because she could stay at a hotel at a discountC．Because she might be able to get course credits for her work.D．Because it’d give her a chance to make a lot of money immediately.
A．Because she might get a good job later.
B．Because she could stay at a hotel at a discount
C．Because she might be able to get course credits for her work.
D．Because it’d give her a chance to make a lot of money immediately.
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