当白棕绳穿过滑车使用时,应选择轮槽直径不小于白棕绳直径()倍的滑车,以免白棕绳承受过

题型:单项选择题

问题:

当白棕绳穿过滑车使用时,应选择轮槽直径不小于白棕绳直径()倍的滑车,以免白棕绳承受过大的附加弯曲应力。

A.10;

B.9;

C.8;

D.7。

考点:线路运行与检修专业考试配电线路(高级工)配电线路(高级工)题库
题型:单项选择题

When I was growing up, I was embarrassed to be seen with my father. He (1) severely crippled and very short, and when we would walk together, his hand on my arm (2) balance, people would stare. I would inwardly be afraid (3) squirm at the unwanted attention. If he ever noticed or was bothered, he never let (4) .
It was difficult to coordinate (5) steps - his halting, mine impatient - and because of that, we didn’t say much as we went along. But as we started out, he always said, "You (6) the pace. I will try to adjust to you. "
Our usual walk was to or (7) the subway, which was how he got to (8) . He went to work sick, and (9) nasty weather. He almost never missed a day, and would (10) it to the office even if (11) could not: a matter of pride!
He never talked about himself as an object of pity, (12) did he show any envy of the more fortunate or able. What he looked for in others was a "good heart", and if he found one, the owner was good enough for him.
Now that I am older, I believe that is a proper standard (13) which to judge people, even though I still don’t know precisely (14) a "good heart" is. But I know the times I don’t have one myself.
He has (15) gone many years now, but I think (16) him often. I wonder if he sensed my reluctance to be seen with him during our (17) . If he did, I am (18) I never told him how sorry I was, how unworthy I was, how I regretted it. I think of him when I complain about trifles, when I am (19) of another’s good fortune, when I don’t have a "good heart".
At such times I put my hand on his arm to regain my (20) , and say, "You set the pace, I will try to adjust to you.\

题型:单项选择题

2013年1月1日,甲事业单位购入一批办公用器材,价款为1000000元,扣留质量保证金400000元,质保期为6个月。该单位以财政授权支付的方式支付了600000元并取得了全款发票。2013年6月30日质保期满,该单位以财政授权支付的方式支付了质量保证金400000元。假设不考虑其他相关税费,下列关于甲事业单位的会计处理中,不正确的是()。

A.2013年1月1日;借:固定资产1000000;贷:非流动资产基金——固定资产1000000

B.2013年1月1日;借:事业支出1000000;贷:零余额账户用款额度600000;其他应付款400000

C.2013年6月30日;借:事业支出400000 ;贷:零余额账户用款额度400000

D.2013年6月30日 借:其他应付款400000;贷:零余额账户用款额度400000

题型:单项选择题

如图是由Emil Zmaczynski设计的金字塔式元素周期表的一部分,图上标有第ⅥA族和几种元素的位置.请回答下列问题:

(1)如图中将铁元素在周期表中的位置是______

(2)自从周期表诞生以来,关于氢元素在周期表中的位置,一直存在纷争,有人主张把它放在第ⅦA族,理由是:氢的最外层电子“饱和缺一”.请写出NaH的电子式______

(3)b元素的氢化物与其最高价氧化物的水化物可生成一种盐,该盐溶于水时______(“抑制”、“促进”或“不影响”)水电离,其反应的离子方程式为______.

(4)下列叙述正确的是______.

A.h的最高价氧化物对应的水化物是一种强碱

B.f的氢化物比硒化氢的稳定性弱

C.c的氢化物的水溶液是强酸

D.原子半径:h>e>a

E.相同条件下,d与f形成的化合物水溶液的pH大于d与g形成的化合物水溶液的pH,说明相同浓度氢化物水溶液的酸性f弱于g

(5)d的某化合物呈淡黄色,可与氯化亚铁溶液反应.若淡黄色固体与氯化亚铁的物质的量之比为1:2,且无气体生成,则该反应的离子方程式为:______.

题型:单项选择题

分化较好的鳞癌细胞以()为主。

A.表层细胞

B.中层细胞

C.内底层细胞

D.外底层细胞

E.柱状上皮细胞的癌细胞

题型:单项选择题

多普勒心排血量测定的基本原理中包括下述哪些参数()

A.心率

B.平均血流速度

C.升主动脉截面积

D.射血时间

E.主动脉瓣口面积

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