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第1题

D是由圆x2+y2=1及x2+y2=4所围成的环形区域. ，二重积分∬x2dxdy的值为（）。 A、 15π/4 B、 4π C、 17π/4 D、 5π
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第2题

The wrongly accused man asked for extra compensation to ________stress he had suffered during the cause. A、make up for
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第3题

The athlete had been ________long legs and a persistent temperament so he was very successful. A、endorsed with B、endow
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第4题

Going with the flow doesn.t mean that we don’t know where we’re going；it means that we________ multiple ways of getting
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