题干

如图是某动物细胞分裂的一组图象,下列叙述错误的是(  )

A:①图过程中,每条染色体的行为相同

B:②发生了基因自由组合

C:③是观察染色体形态和数目的最佳时期

D:由④可判断该动物一定是雄性

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D

同类题3

任务型阅读

    Are you planning to go to university? ____Perhaps you will be choosing the classes you want to take, finding accommodation and enrolling in other activities. However, if you go to university in Chile there is something extra you must do before you can begin.

    An essential part of starting university in Chile is the “mechoneo”____ Students beginning their first year at university are “welcomed” by the older university students. They are taken from their classrooms on an unknown day and blindfolded. The older students tear their clothes, cut their hair, and cover them in raw eggs and other disgusting things.

    ____ This will be based on how well the students do the activities, and many students try very hard as they want to be the king or queen of the year. The older students then take away everything of the younger students and tell them they must go out onto the street and ask people for money. They will need to bring back a certain amount of money in order to be given their things back.____

    During March it is common to see new university students all around town wearing ripped, dirty clothes and covered in paint and mess. But the “mechoneo” is increasingly a source of dispute and debate. Some students see it as an important tradition and a unique experience that help new arrivals get to know everyone.____ There have been campaigns to ban or soften it in favour of more “positive welcomes'', and student organizations in some universities have voted to end the “mechoneo” completely.

A. It is an ancient university tradition here.

B. The younger students are forced to do games in dirty places.

C. The “queen mechona” and “king mechon” are chosen that day.

D. They have to do games and take up challenges for a whole day.

E. But others find it abusive, like a form of bullying.

F. What do you think you need to do in the first few weeks?

G. The money is then used to have a massive welcome party at night-time.

同类题4

阅读下面这篇文章,完成小题

靠什么击碎“健康谣言”

       ①声称有“癌症预防研究所”公布抗癌防癌蔬菜排行榜,“国务院防癌办”建议网友转发,事实上国务院根本没有这个机构;因为网上谣传“柿子有毒”,导致不少地方刚成熟的柿子鲜有人问津,只能低价销售……近日,《生命时报》梳理今年以来有关健康的网络谣言,指出健康知识传播、普及过程中存在的种种问题,引发舆论广泛关注。

       ②信息爆炸时代,获取信息变得异常简单。丰富认知的同时,也对我们甄别信息真伪的能力提出了挑战。

       ③统计显示,微信用户平均每天在微信平台上阅读5.86篇文章,排名第二的就是健康养生类文章。

       ④很多人可能会有这样的经历:微信群、朋友圈中,时常有热心的亲戚朋友,乐于分享“致癌提醒”“养生信息”“民间偏方”等链接,有些内容令人震惊甚至耸人听闻。他们往往忽视对信息真实性的查证,只是想当然地分享“转需(转给需要的人)”。看似在帮助他人,其实是为谣言的传播提供了便利。媒体从业者当然要恪守职业操守,严把新闻审核关,可在自媒体兴盛的时代,我们作为一般受众,又该如何做一个负责任的健康知识传播者呢?

       ⑤健康是人人关心的问题,也正因如此,健康信息有利可图,一些人鱼目混珠,钻的就是大家健康素养不高的空子。比如有人冒充专家,以“免费”作诱饵,借“权威”博信任,靠做讲座来卖产品,专门坑骗老年人;或者只是学了点皮毛,就频繁上电视、开专栏,宣扬各种偏方,不仅浪费患者钱财,也耽误了他们看病治疗的最佳时机。凡此种种,如果仔细推敲,并不难发现其中的常识错误和逻辑漏洞。但一而再、再而三地有人上当受骗,除了自身警惕性较差外,也暴露出健康素养方面的短板。

       ⑥不可否认,相比过去,中国人的健康素养提高了不少,但从总体来看,据卫计委数据显示,每100个15—69岁的人中,仅有不足10人具备基本健康素养,整体水平仍然较低。前几天发生的一起伤医事件,起因居然是患者强迫医生按照百度上查询的结果治疗被拒。要想彻底走出健康焦虑,当好自己和家人的“保健医生”,需要尊重科学、具备一定的科学素养。

       ⑦“一个人健康素养的高低不在于他知道多少,而在于他能否根据自身健康需要,主动寻找并正确判断相关信息,改变自己的生活方式。”当然,这样说并不是逼着每个人都去当火眼金睛的专家。健康知识的积累、健康意识的培养,不仅需要个人的努力,更需要来自政府、社会的合力。从2011年日本福岛核泄漏事件后,中国部分城市发生抢盐风波,到2013年出现人感染H7N9禽流感病例,鲜有人敢吃鸡肉,面对各种似是而非的小道消息,“宁可信其有,不可信其无”一直是不少人的首选策略。其中很重要的一个原因,在于他们并不知道谁能提供最及时、权威的说明解释。从这个意义上说,打消疑惑、安定人心的关键,是最大程度消除信息的不对称。政府部门和权威机构有义务用通俗的表达方式、灵活的沟通手段,多渠道公布信息,帮助公众增强对谣言的辨别能力,进而全面提升健康认知水平。

       ⑧人们常说:“造谣一张嘴,真相跑断腿。”不让谣言有可乘之机,就得让真相始终跑在谣言的前面。最近,上海一位医生出于好奇,进入网络直播间与网友们面对面聊天。从治病到养生,有问必答,短短1小时内收获数万点赞。这样的健康科普,既能体现传授者的价值,又方便观众观看学习,谁不喜欢?放大主流健康媒体的“高品质”声音,锲而不舍地普及科学知识,全民健康素养的“水位”才有可能节节升高。

                                                                                                                                                          (选自2016年11月28日《人民日报》,有删改)