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【单选题】
关于计算机配置的描述中，正确的是( )。A.
SATA是串行接口硬盘标准
B.
SAS是并行接口硬盘标准
C.
LCD是发光二级管显示器
D.
PDA是超便携计算机
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【单选题】听力原文：W: Why is Bob so tired and worn out'? M: He's been studying day and night for his final term paper! I have warned him many times to prepare earlier, but he would not listen. What does the man mea...
A.
Bob is too tired to study any more.
B.
He told Bob not to study late at night.
C.
He had often advised Bob to prepare earlier.
D.
Bob didn't hear the warning.
【简答题】Why is he so tired? He (play) basketball for five hours.
【多选题】以下关于需求价格弹性大小与销售收入的论述中，正确的是( )。
A.
需求弹性越大，销售收入越大
B.
如果商品富有弹性，则降价可以扩大销售收入
C.
如果商品缺乏弹性，则降价可以扩大销售收入
D.
如果商品富有弹性，则降价可以提高利润
E.
如果商品为单位弹性，则价格对销售收入没有影响
【简答题】Why is he so tired?
He (play) _______________ tennis for five hours.
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