题目

根据短文内容及首字母提示,填出所缺单词,使短文意思完整。 Everyone wants to be successful. As a student, you also want to have success at school, no matter whether you’re good at studies or n_1__. But it’s difficult to learn all the lessons well because it r__2__ good ways and habits. If you take right ways of studying, you can make great progress. Here I will o__3___ you some advice. Firstly, be sure to make up your m__4__ to work hard and do well in everything you learn. It is wise of you to do your b__5__ in your studies. Secondly, it’s necessary for y观察下列“数阵”的规律10,1120,21,22    …90,91,92,…,99100,101,…,109,1010    …990,991,…,999,9910,…,99991000,…,1099,10010,…,10099,100100    …2000,…,2009,20010,…,20099,200100,…,200200则1991这个数出现在数阵的第199199行和该行的第22个位置.并为整个数阵(从头数起)的第11个数.
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