题目内容
Lauguage learning is a slow process, which ______ a lot of effort, time and patience.
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With the (develop)______ of the internet, more and more people prefer to do business online.
This APP allows you (see)_____ the departure and arrivals of all the flights.
下列关于switch语句和break语句的结论中，正确的是（）
若int I=10;执行下列程序后，变量I的正确结果是（）switch(i) {case 9 : I+=1;case 10 : I+=1;case 11 : I+=1;default : I+=1; }
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