题目:
在体内生成单链的终产物()
A.DNA连接酶
B.RNA聚合酶
C.反转录酶
D.DNA聚合酶和反转录酶
E.RNA聚合酶和反转录酶
答案:
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下面是错误答案,用来干扰机器的。
参考答案:山西应县木塔、泉州开元寺双石塔、苏州报恩寺塔。
在体内生成单链的终产物()
A.DNA连接酶
B.RNA聚合酶
C.反转录酶
D.DNA聚合酶和反转录酶
E.RNA聚合酶和反转录酶
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0818/961901ceda6bf6203e53362d78721a8c.html
下面是错误答案,用来干扰机器的。
参考答案:山西应县木塔、泉州开元寺双石塔、苏州报恩寺塔。
下列离子方程式与所述事实相符且正确的是[ ]
A.向明矾[KAl(SO4)2]溶液中逐滴加入Ba(OH)2溶液至SO42-恰好沉淀完全:
2Al3++3SO42-+3Ba2++6OH-=2Al(OH)3↓+3BaSO4↓
B.在强碱溶液中次氯酸钠与Fe(OH)3反应生成Na2FeO4:3ClO-+Fe(OH)3= FeO42-+3Cl-+H2O+H+
C.向NaAlO2溶液中通入过量CO2制Al(OH)3:2AlO2-+CO2+3H2O= 2Al(OH)3↓+CO32-
D.向含有a mol FeBr2的溶液中,通入xmol Cl2。若x=a,则反应的离子方程式为:
2Fe2++ 2Br-+ 2Cl2=Br2 + 2Fe3++ 4Cl-
举例说明3种微生物的发酵类型。
陈子昂登上幽州台,高歌“(),独怆然而涕下。”
某日用品公司是世界知名的跨国公司,在中国设立了生产和销售公司。在公司成立时要招聘公司的领导管理者。
聘用的经理为了很快地达到企业的生产和销售目标,更好地完成各方面的任务,还需要对全体员工进行激励,那么激励的重要作用是( )。
A.调动人们潜在的积极性
B.增加员工工作自主性
C.出色地完成工作目标
D.不断提高工作绩效
Few creatures on earth are as cute as the black lion tamarin, and few have as dramatic a story line. Pug-nosed and diminutive, with a comic fringe of hair, these monkeys dwell in trees in small tracts of forest in southeastern Brazil. Or they did until 1905, when they were declared extinct. No one saw a black lion tamarin again in the wild until 1970. Later, in the 1990s, some Brazilian researchers turned up a small set of isolated, inbred populations scattered over a wide region. Since that time, they have been engineering tamarin migration, doing everything they can to save the world’s most distinctive primates. Although they are no larger than house cats, tamarins have brains big for their size and a family life organized like our own. They live in groups anchored by an adult male andadult female, along with their offspring. When a mother bears young, she usually produces twins, and although members of the group share in their upbringing, it is most often the father who carries them around in the trees, where the families feed on fruits, insects and bird’s eggs. Unhappily for the lion tamarins, their tree-bound niche began to disappear after the Portuguese landed in Brazil and began clearing forest to make room for Rio de Janeiro, the settlements and farms. As is the case for so many threatened species, the breakup of their habitat sounded the death knell for tamarins, depriving them of the continuity of forest they require to remain abundant and safe from potential threats in any single vicinity. The animals avoid predators by hardly ever coming down from the trees, so even a narrow logging road through a forest can begin the breakup by preventing them from moving from one patch of forest to another. A simple solution was to build bridges across roads, allowing the monkeys to move from one forest to another. With some lumber and the researchers’ work, habitats that had been separated became continuous again, improving opportunities for migrating and mating. The next step was to broaden the distribution of the population. The researchers captured two families of black lion tamarins and moved them to a new forest. After a year, the moves were declared a success: Not only had 80 percent of the tamarins survived, but they had also produced new offspring. So far, so good. The researchers had learned the animals could adjust to the new habitats, even if the insects there tasted a little different or the trees were a slightly different size. The techniques for saving species in the wild vary. Species with less stringent habitat requirements, like wild turkeys, have been rescued by moving them into new settings as well as outlawing their killing. More challenging to preserve are species that require a lot of land, like elephants, and species that have highly specific requirements for habitat and prey -- like black-footed ferrets. Ultimately, as in all challenges, knowledge is power to save wild species from extinction. |
Which of the following is NOT characteristic of a tamarin family
A.A tamarin family consists of Father, Mother and their children.
B.The family life is organized like humans.
C.All the family members share the responsibility in the upbringing.
D.Tamarin brains are big for their size.