某人在保险柜中存放了,元现金,第一天取出它的,以后每天取出前一天所取的,共取了7天,保险柜中剩余的现金为()
A.
B.
C.
D.
E.
参考答案:A
解析:
最后剩余的现金为
根据括号内的汉语提示,完成句子。(每空一词)
1. If anyone _____________ (不遵守) the traffic rules, he may have a traffic accident.
2. People may feel sick after _______________ (呼吸) polluted air.
3. All your homework needs _______________ (上交) in before lunch.
4. Can you make yourself _______________ (听懂) in the USA?
5. English is spoken ______________ (不同) in some English-speaking countries.
6. The rubbish ____________ (产生) every day is a serious problem.
化简:a-4(2a-b)-2(a+2b)