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【单选题】
Like fine food,good writing is something we approach with pleasure and enjoy from the first taste to the last.And good writers,like good cooks,do not suddenly appear full-blown.Quite the opposite,just as the cook has to undergo a particular training,mastering the skills of his trade,the writer must sit at hisdesk and devote long hours to achieving a style in his writing,whatever its purpose is—schoolwork,matters of business,or purely social communication. You may be sure that the more painstaking the effort,the more effective the writing,and the more rewarding. There are still some faraway places in the world where you might find a public scribe to do your business or social writing for you,for money. There are a few managers who are lucky enough to have the service ofthat rare kind of secretary who can take care of all sorts of letter writing with no more than a quick note to work from.But for most of us,if there is any writing to be done,we have to do it ourselves. We have to write school papers,business papers or home papers.We are constantly called on to put words to papers.It would be difficult to count the number of such words,messages,letters,and reports put intomails or delivered by hand,but the daily figures must be extremely large.What is more,everyone who writes expects,or at least hopes whatever he writes will be read,from first word to last,not just thrown into some “letters-to-be-read” files or into a wastepaper basket.This is the reason we bend our efforts toward learning and practicing the skills of interesting,effective writing. In this passage,good writing is compared to fine food in that _______.
A.
both writers and cooks have to work a long time every day
B.
both are essential to life
C.
both are writers and cooks can earn a good living
D.
both are enjoyable
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【简答题】甲类卷烟是指每标准条调拨价______以上的卷烟。
【单选题】以样本均值为估计量对总体均值进行区间估计,且总体方差已知,则如下说法正确的是 ( )
A.
95 %的置信区间比 90 %的置信区间宽
B.
样本容量较小的置信区间较小
C.
相同置信水平下,样本量大的区间较大
D.
样本均值越小,区间越大
【单选题】甲类卷烟是指( )
A.
每标准条调拨价格在 70 元(不含增值税)以上(含 70 元)的卷烟
B.
每标准条调拨价格在 60 元(不含增值税)以上(含 70 元)的卷烟
C.
每标准条调拨价格在 50 元(不含增值税)以上(含 70 元)的卷烟
D.
每标准条调拨价格在 80 元(不含增值税)以上(含 70 元)的卷烟
【单选题】甲类卷烟是指每标准条调拨价格在50元(不含增值税)以上(含50元)的卷烟。 ( )
A.
正确
B.
错误
【单选题】关于库肯勃氏瘤,错误的是
A.
原发于胃肠道的卵巢转移肿瘤
B.
超声检查常发现双侧卵巢受侵
C.
多伴腹水
D.
肿瘤组织中存在印戒样细胞
E.
卵巢良性肿瘤
【单选题】2016年以来,中央召开了有关国企改革发展的系列会议,部署了国企十项改革试点工作。会议强调,必须理直气壮地做强做大国有企业,不断增强其活力、影响力、抗风险能力,这是基于( )
A.
我国的基本经济制度符合现阶段国情
B.
我国各种所有制经济平等竞争共同发展
C.
国有经济是国民经济的主导力量
D.
国有经济的主体地位绝不动摇
【单选题】以样本均值为估计量,对总体均值进行区间估计,且总体方差一只,则下列说法正确的是( )
A.
95%的置信区间比90%的置信区间宽
B.
样本容量较小的置信区间较小
C.
相同置信水平下,样本量大的区间较大
D.
样本均值越小,区间越大
【简答题】请从选项( A. BCR; B. LFA-1; C. CD40L; D. CD28; E. CD21;)中,选取最佳答案填入横线中: B 细胞上 B7 相应 的配 体 分子是 ____; 向 B 细胞提供第二活化信号的最重要共刺激分子是 ____; B细胞上 C3d 相应 的 受体是 ____ ;B细胞上能特异性结合抗原 的 受体是 ____。
【判断题】甲类卷烟是指每标准条调拨价格在50元(不含增值税)以上(含50元)的卷烟。()
A.
正确
B.
错误
【多选题】以样本均值为估计量对总体均值进行区间估计,且总体方差已知,则如下说法正确的是( )
A.
总体标准差的大小
B.
允许误差的大小
C.
抽样估计的把握程度
D.
总体参数的大小
E.
抽样组织形式
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