如图,用火柴棍拼成一个由三角形组成的图形,拼第一个图形共需要3根火柴棍,拼第二个图形共需要5根火柴棍;拼第三个图形共需要7根火柴棍;……照这样拼图,则第n个图形

如图,用火柴棍拼成一个由三角形组成的图形,拼第一个图形共需要3根火柴棍,拼第二个图形共需要5根火柴棍;拼第三个图形共需要7根火柴棍;……照这样拼图,则第n个图形需要___________根火柴棍.

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某校七年级1班50名同学在“森林草原防灭火”知识竞赛中的成绩如表所示:成绩60708090100人数3913169则这个班学生成绩的众数、中位数分别是( )

某校七年级1班50名同学在“森林草原防灭火”知识竞赛中的成绩如表所示:成绩60708090100人数3913169则这个班学生成绩的众数、中位数分别是( )

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There is no need to push the kids too hard.______, you hate to see them stressed

There is no need to push the kids too hard.______, you hate to see them stressed out.

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—China is ________ the one that it was 70 years ago. —Sure!Our country’s develop

—China is ________ the one that it was 70 years ago. —Sure!Our country’s development becomes a focus

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—What’s the best movie theater in town? —Sun Cinema. You can sit the most ______

—What’s the best movie theater in town? —Sun Cinema. You can sit the most ________ there.

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