There might be as many as 10 million species of complex life on this planet today —— a huge number. But add up all of the complex species that ever lived and some biologists think the grand total would be about five billion. The estimate leads to an astonishing conclusion: a staggering 99% of species are not around any more. They have been driven to extinction.

    More species are joining the ranks of the extinct every year. Many scientists believe we are living through an episode of remarkably rapid extinction, on a scale that has been seen only five times in the last half a billion years.

    They call this current episode the sixth mass extinction —— a large, global decline in a wide variety of species over a relatively short period of time. And they tend to agree that humans are the main cause.

    Over-hunting, overfishing, and human-driven habitat loss are pushing many species to the brink. In fact, we have changed the planet so much that some geologists are now suggesting that we have entered a new phase in Earth's history; an epoch they call the ＂Anthropocene＂. By 2100, it is expected that humans will have caused the extinction of up to half of the world's current species.

    Because we are living through this extinction, it is relatively easy for us to study the driving forces behind it. But how do we determine what caused other mass die-offs that happened long ago? To do so we have to look at what archaeologists, palaeontologists, geologists and other scientists have concluded from the evidence they have gathered.

    The trouble is, those scientists do not always agree with one another —— even about the most recent extinction event. As well as the five-or six- mass extinctions, there have also been many smaller extinctions.

    One of these mini extinction events happened towards the end of the Pleistocene, a few tens of thousands of years ago. It is sometimes called the ＂megafaunal＂ extinction because many of the species it claimed were particularly large animals, weighing more than 97lb (44kg). However, its cause remains a debate amongst scientists.

2016年10月24日至27日，中共中央十八届六中全会在北京召开，党中央对全面从严治党作出全面统筹战略部署，制定了新形势下党内政治生活若干准则，会议强调：“办好中国的事情，关键在党，关键在党要管党、从严治党。”党要管党、从严治党的理由是（    ）

①国家大事必须有***决定

②***是中国特色社会主义事业的领导核心

③使生产关系更好的适应生产力发展要求

④使上层建筑更好的适应经济基础发展要求

写作。
       题目：请以“有些_______不可以忽略”为题，写一篇文章
      要求：①先将题目补充完整再作文。②文体不限（诗歌、戏剧除外）。③不少于600字。④文中不得出现真实的地名、校名、人名。⑤不得抄袭。

函数$f\left(x\right)=\sin x\sin \left(x+\frac{\mathrm{\pi }}{2}\right)$的最小正周期为(      )

阅读【甲】【乙】两个文段，完成问题。

【甲】

      金溪民方仲永，世隶耕。仲永生五年，未尝识书具，忽啼求之。父异焉，借旁近与之，即书诗四句，并自为其名。其诗以养父母、收族为意，传一乡秀才观之。自是指物作诗立就，其文理皆有可观者。邑人奇之，稍稍宾客其父，或以钱币乞之。父利其然也，日扳仲永环谒于邑人，不使学。

      余闻之也久。明道中，从先人还家，于舅家见之，十二三矣。令作诗，又七年，还自扬州，复到舅家问焉。曰：“泯然众人矣。

      王子曰：仲永之通悟，受之天也。其受之天也，贤于材人远矣。卒之为众人，则其受于人者不至也。彼其受之天也，如此其贤也，不受之人，且为众人；今夫不受之天，固众人，又不受之人，得为众人而已耶？

【乙】

      欢^①字景怡，吴郡盐官人。欢年六七岁，父使驱田中雀，欢作《黄雀赋》而归，雀食过半。父怒，欲^②挞之，见赋乃止。乡中有学舍，欢贫，无以受业，于舍壁后倚听，无遗亡者。八岁，诵《孝经》、《诗》、《论》．及长，笃志好学。母年老，躬耕读书，夜则然^③糠自照。同郡顾恺之临县，见而异之，遣诸子与游，及孙宪之，并受经句。……欢于剡天台山开馆聚徒，受业者常近百人。

                                                                                                                                                                             《南齐书•顾欢传》

     【注释】①欢：南朝齐大臣，著名道教学者。②挞：用鞭棍打人。③然：通“燃”。