某产品共有三个等级，分别为一等品、二等品和不合格品．从一箱产品中随机抽取1件进行检测，设“抽到一等品”的概率为0.65，“抽到二等品”的概率为0.3，则“抽到不合格品”的概率为（　　）

为除去下列物质中的杂质（括号内为杂质），下列操作方法不能达到目的是（  ）

90年前，南昌城头一声枪响，宣告中国诞生了***领导的新型人民军队。90年来，这支在战火中诞生的光荣之师走过硝烟、走过风雨，走过了史诗般的壮丽征程。

材料一：2017年8月1日是中国人民解放军成立90周年，为纪念这一神圣的日子，我国在朱日和训练基地举行了盛大的阅兵式。

材料二：阅兵仪式上，有许多武器装备在这次首次展出：歼20，红旗—22，东风31—AG，这些都是我国自主研发成果，也是我国重视科技创新的成果展示。要想实现从“制造大国”向“创造大国”的转变，就必须重视创新。

材料三：本次阅兵共有九个作战群接受检阅，为了取得成功，许多将士吃睡在训练基地。一个完美的阅兵式需要全体受阅将士的共同努力，更需要他们团结合作

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      Carol studies at Roosevelt High School. She is having a hard time passing exams. She has no interest in her homework, so she seldom finishes it on time.

     But there is one lesson she is doing well in. It is history. Carol always hands in her history homework on time. She respects the history teacher Mr Aragon. Carol feels that Mr Aragon treats her more than just a student. She feels other teachers look down on her.

      Carol's mother Maria told Mr Aragon that Carol wasn't doing well in her other lessons. Mr Aragon was surprised to learn that. "She is such a smart girl," he told Maria. Mr Aragon told Maria that he would talk to her daughter.

Carol felt embarrassed when Mr Aragon talked to her about the problems she was having in other lessons. But later Carol understood that Mr Aragon just wanted to help her. Mr Aragon and Carol had a discussion about what she could do to improve her marks in other lessons. They made a list of ways to help her to complete her homework on time, including setting a timetable for homework, cutting down some boring after-school activities, and having a friend help her with the homework. Carol decided to try these ways out to see which one would work best for her.