收缩喷管处于超临界工作状态时()
A.实际压力比等于1.85
B.实际压力比大于1.85
C.实际压力比小于1.85
D.实际压力比等于可用压力比
参考答案:A
Aunt Mary is crazy about shopping. She must be snapping up the bargains in the department store during such a sale, ?
A.mustn’t she?
B.isn’t she
C.needn’t she
D.doesn’t she
Pentium微处理器在实模式下,最小的段只有______字节。