下列各细胞中，分化程度最高的是            （   ）

如图漫画中推进精准扶贫有利于（　　）

①保障和改善民生， 维护最广大人民的根本利益       ②全体人民共享发展成果， 彻底消除城乡差别

③维护社会公平正义，构建社会主义和谐社会            ④促进经济持续健康发展，全面建成小康社会

设函数 $f\left(x\right)=\frac{\sin \theta }{3}{x}^3+\frac{\sqrt{3}\cos \theta }{2}{x}^2+\tan \theta$ ，其中 $\theta \in 0,\frac{5\pi }{12}$ ，则导数f′（1）的取值范围是____．

阅读下面材料，从每题所给的A、B、C、D四个选项中选出最佳选项。

B

    You may know the English letters A, B and C, but do you know there are people called "ABC"? You may like eating bananas, but do you know there are people called "banana persons"? If you don't know, I will tell you about it. They are some Chinese people like you and me, but they aren't in China. Why do people call them like that?

    If we call somebody an ABC person, we mean he or she is a Chinese but was born in America. Sometimes, people also call them "banana persons". A banana is yellow outside and white inside. So if somebody is a "banana person", he or she is "white" inside and "yellow" outside. By saying that, we mean he or she has yellow skin(皮肤) but does things in an American way. "Banana persons" were born in America and they live in America for a long time, so they think like Americans and do things like Americans. However, these people still have Chinese blood(血统). Their parents, grandparents or even great-grandparents are from China. They all have black eyes and black hair, so they look like us, Chinese people.

    There are many famous "banana persons" in America. They do very well in America and they are really great in their own fields.

新中国成立初期，蝗虫波及7省2市，灾情十分严重。1952年，国家组建了中国科学院昆虫研宄所和昆虫生态学研究室，委派中国生态学奠基人马世骏先生带领一批科学家和技术人员技出根治蝗灾的办法。延续了两千多年的蝗灾，在新中国成立后的短短几年内便得到有效防，不能不说是一个奇迹。科学家和技术人员的努力，国家的高度关注和支持，社会各方面的配台，是治蝗成功的关键因素。自此我们可以认识到（   ）