移动端

  • 题王微信公众号

    题王微信公众号

    微信搜“题王网”真题密题、最新资讯、考试攻略、轻松拿下考试

单选题

层流的沿程损失hf与平均流速v的多少次方成正比()?

发布日期:2020-04-13

层流的沿程损失hf与平均流速v的多少次方成正比()?
A

2次方

B

1.75次方

C

1次方

D

1.85次方

题王网让考试变得更简单

扫码关注题王,更多免费功能准备上线!

此试题出现在

CMS专题

CMS专题

去刷题
热门试题热门资讯 相关试题

In every cultivated language, there are two great classes of words which, taken together, comprise the whole vocabulary. First, there are those words(1)which we become acquainted in daily conversation, which we(2),that is to say, from the(3) of our own family and from our familiar associates, and(4) we should know and use (5 )we could not read or write. They (6) the common things of life, and are the stock in trade of all who (7) the language. Such words may be called“popular”, since they belong to the people (8) and are not the exclusive (9) of a limited class. On the other hand, our language (10) a multitude of words which are comparatively (11) used in ordinary conversation. Their meanings are known to every educated person, but there is little (12) to use them at home or in the market-place. Our (13) acquaintance with them comes not from our mother's (14) or from the talk of our school-mates, (15) from books that we read, lectures that we (16) ,or the more (17)conversation of highly educated speakers who are discussing some particular (18) n a style appropriately elevated above the habitual(19) f everyday life. Such words are called“learned”, and the (20) between them and the“popular”words is of great importance to a right understanding of linguistic process. 请在12处填上正确答案()

根据我国相关规定,关于媒体实习记者的采访,正确的是。()

全部通过4号筛,但混有能通过5号筛不超过60%的粉末是()

以下哪个女性角色和凌波丽的声优是同一人()

推理的要素包括()。

简述釉质平滑面龋的组织病理学改变

患者女,66岁。脾破裂伴失血性休克,手术行脾切除术,补充血容量纠正休克。术后第2天出现无尿,应用呋塞米治疗无效。目前,每天的补液方案应采取()

影响供给的因素或供给函数的影响因子有()

一国居民直接在另一国家进行对企业的投资的行为是()。

患儿6岁,生长发育落后,曾经多次患肺炎,平时无紫绀。听诊于胸骨左缘上方闻及一连续性“机器”样杂音,伴水冲脉、指甲床毛细血管搏动。该患儿的治疗为()

暂无相关推荐~