有的A/O工艺中,A段为厌氧段,为什么还要空气管曝气呢?

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问题:

有的A/O工艺中,A段为厌氧段,为什么还要空气管曝气呢?

考点:监理知识竞赛给排水知识给排水知识题库
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如图为蝗虫和果蝇的发育过程图,A、B、C、D为发育过程的各个阶段,据此回答:

(1)若蝗虫的发育阶段是CDB,果蝇的发育阶段是CDAB,则可推理得出:A______,B______,C______,D______;

(2)蝗虫属于______发育类型,果蝇属于______发育类型;

(3)科学家对果蝇基因组框架图进行测绘,若分别采用A、B、C、D四个阶段的细胞为实验材料,请你判断所绘制的基因组框架图是否一样?______.

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某宾馆工程,地下1层,地上20层,为现浇钢筋混凝土剪力墙结构,建筑面积24 000mz,混凝土设计强度等级为C30。该工程为加快施工进度选用硅酸盐水泥,得到了建设单位、监理单位的认可。同时,该工程使用低合金高强度结构钢作为建筑材料。

硅酸盐水泥的代号是( )。

A.P·O

B.P·C

C.P·S

D.P·Ⅰ或P·Ⅱ

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A good modern newspaper is an extraordinary piece of reading. It is remarkable first for what it contains the range of news from local crime to international politics, from sports to business to fashion to science, and the range of comment and special features (特定) as well, from editorial page to feature articles and interviews to criticism of books, art, theatre and music. A newspaper is even more remarkable for the way one reads it never completely, never straight through, but always by jumping from here to there, in and out glancing at one piece, reading another article all the way through, reading just a few paragraphs of the next.
A good modern newspaper offers a variety to attract many different readers, but far more than any one reader is interested in. What brings this variety together in one place is its topicality (时事性), its immediate relation to what is happening in your world and your locality now. But immediacy and the speed of production that goes with it mean also that much of what appears in a newspaper has no more than transient (短暂的) value.
For all these reasons, no two people really read the same paper: what each person does is to put together out of the pages of that day’s paper, his own selection and sequence, his own news paper. For all these reasons, reading newspapers efficiently, which means getting what you want from them without missing things you need but without wasting time, demands skill and self-awareness as you modify and apply the techniques of reading.

A modem newspaper is remarkable for all the following except its ______.

A. wide coverage



B. uniform style
C. speed in reporting news


D. popularity

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患者,女,31岁,结婚5年未孕。月经后期,量多少不定,经前 * * 胀痛,胸胁不舒,小腹胀痛,烦躁易怒,舌红,苔薄,脉弦。妇科检查正常,基础体温为单相,男方检查无异常。已确认为排卵障碍性不孕,治疗应首选

A.氯蔗酚胺加启宫九

B.氯菧酚胺加少腹逐瘀汤

C.氯菧酚胺加开郁种玉汤

D.雌激素加少腹逐瘀汤

E.雌激素加开郁种玉汤

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凡是负反馈,都能起到()取样对象的效果。

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