Where do you want to send your boys to study?A mixed school or a boys' school?____ (traditional),boys and girls attend a mixed school,where they study together.But boys in a single-sex school____(say) to be more likely to get involved in____(culture) and artistic activities that help develop their emotional expressiveness than____(teach) alongside girls,according to the findings of some researchers.

    They say in a single-sex school teachers can tailor lessons to boys' learning style,____they can also encourage boys to enjoy reading and writing with "boy-focused"____(approach) that appeal to them.For example,they are more active and can learn best through touch,so letting them move around____classroom and getting them____(compete) in teams can prevent boredom.“What's more,boys in a single-sex school won't feel forced to act____men before they understand____(them) well enough to know what that means.”the study reported.

“家风”是什么？有人说，“家风”是老老实实做人，踏踏实实做事；有人说，“家风”是勤劳节俭；有人说，“家风”是做事要坚持不懈；有人说，“家风”是遇到困难不低头；有人说，“家风”是朴实诚恳；有人说，“家风”是要自强自立……倡导这样的“家风”，下例说法正确的是（    ）
①是社会主义精神文明建设的具体体现    ②是对我国传统文化的全面继承  

③是社会主义思想道德建设的重要内容    ④是中华文化走向世界的唯一途径

已知函数$f\left(x\right)$定义在R上的奇函数，当$x<0$时，$f\left(x\right)=e^x\left(x+1\right)$，给出下列命题：
①当$x>0$时，$f\left(x\right)=e^x\left(1-x\right)$  ②函数$f\left(x\right)$有2个零点
③$f\left(x\right)>0$的解集为$\left(-1,0\right)\cup \left(1,+\infty \right)$       ④$\forall x_1,x_2\in R$，都有$\left|f\left(x_1\right)-f\left(x_2\right)\right|<2$
其中正确命题个数是(      )

根据达尔文的进化论，自然选择的结果是（　　）