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【多选题】
关于STC89C52RC单片机的掉电模式,下列说法正确的是( )A.
RAM内容被保存
B.
振荡器被冻结
C.
单片机一切工作停止,直到下一个中断或硬件复位为止
D.
典型功耗<0.1μA
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反馈参考答案：
举一反三
【简答题】小丽每隔5天去一次超市购物，小杰每隔7天去同一家超市购物．国庆节这一天小丽、小杰都去了这家超市购物，问至少再经过多少天，他们又会在同一天去这家超市购物？
【单选题】. His efforts to persuade him to make a donation were ____ because he showed no intention to take a cent out of his pocket.
A.
in place
B.
in sight
C.
in vain
D.
in effect
【简答题】He showed no to get publicity. He was a real scholar.
【简答题】评论下述说法：“MRP系统仅仅准备了购物表，而并没有去购物或去做晚餐。”
【单选题】His parents meant him_____________ scientific research, but he showed no interest and turned poet.
A.
going in for
B.
to have gone in for
C.
to go in for
D.
having gone in for
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