题目内容

IBM PC/AT机采用2个8259A级联，CPU的可屏蔽硬中断可扩展为( )。

A. 64级
B. 32级
C. 16级
D. 15级

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[A] kinds [C] mean[B] means [D] types

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下述溶液在相同温度下饱和蒸汽压最低者是( )。

A. ( 0.1m0l/1NaCl水溶液
B. ( 0.1mol/l蔗糖水溶液
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