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问题 单项选择题

鼠标用久了，使用中光标移动不够矫捷，最可能的原因是（）。

A.鼠标与主机毗连线脱落

B.尘埃附到橡皮球和转轮上，轻易积垢

C.鼠标按键下面的弹簧老化

D.操作者独霸鼠标不稳

答案

参考答案：B

选择题

Faced with the bad economic situation overseas, more Chinese students are returning home after studying abroad, a _______ that looks likely to continue in the coming years, a report released this week says.

A．priority

B．response

C．dilemma

D．trend
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填空题

30.9读作______，四十八点零五写作______．
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