日本9.0级地震引发海啸及核泄漏，不少地方出现抢购碘盐的狂潮，用于防护核辐射。精制碘盐是食盐中添加一定量的碘酸钾，医疗专家提醒：由于碘盐中碘含量相对较低，根本起不到预防放射性碘的作用．吃加碘盐防辐射完全不科学，盲目过量吃碘盐或碘片，可诱发甲状腺功能减退、甲状腺肿等疾病．回答下列问题：

直线y=x与函数$f\left(x\right)=\left\{\begin{array}{c}2,x>m\\ x^2+4x+2,x<m\end{array}\right.$的图象恰有三个公共点，则实数m的取值范围是____

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1）每处错误及其修改均仅限一词；2）只允许修改10处，多者（从第11处起）不计分。

    Last week, our teacher offered us an answer to a difficulty maths problem in class. Though an answer seemed a little strange, but nobody doubted it except me. Thinking that his answer might wrong, I carefully studied the problem and tried to work them out in a different way. Half an hour late, I managed to find the correct answer. When I show my answer to him, my teacher praised me of my independent thinking.

    From this experiences I have learnt that questioning can serve as a bridge that help us to find the truth.

随着人们消费水平的提高和影院建设的进步，近年来我国电影市场火爆异常，2016年大年初一到初六，全国累计票房达到30.1亿元人民币，同比增长67%。这说明（  ）

某生物兴趣小组观察了几种生物不同分裂时期的细胞，并根据观察结果绘制出如下图形。下列与图形有关的说法中正确的是