在梯形ABCD中，AD∥BC，∠B=90°，∠C=45°，CD=10 cm，BC

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问题填空题

在梯形ABCD中，AD∥BC，∠B=90°，∠C=45°，CD=10 cm，BC=2AD，则梯形的面积为（）.

答案

75 cm²

选择题

________, what she had devoted herself to resulted in nothing but failure.

A．To her much disappointment

B．To her great disappointment

C．Great to her disappointment

D．To her disappointment much

单项选择题

PC机中CPU执行MOV指令从存储器读取数据时，数据搜索的顺序是( )。

A．从L1 Cache开始，然后依次为L2 Cache、DRAM和外设

B．从L2 Cache开始，然后依次为L1 Cache、DRAM和外设

C．从外设开始，然后依次为DRAM、L2 Cache和L1 Cache

D．从外设开始，然后依次为DRAM、L1 Cache和L2 Cache