金属会生锈是因为接触到空气中的()。

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问题:

金属会生锈是因为接触到空气中的()。

考点:事业单位工勤技能考试第三章自然科技常识第三章自然科技常识题库
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下列有关中国古代傩戏的说法,正确的是

①带有明显的巫术色彩 ②在先秦时代成为国家祭祀和礼仪制度的重要组成部分

③汉代和唐代,傩仪还很盛行 ④随着宗教色彩的淡化,巫术仪式转化在戏剧表演  [ ]

A.①②③

B.②③④

C.①③④

D.①②③④

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直径为0.8m的钻孔灌注桩,桩长L=30m,采用泥浆护壁、水下浇灌混凝土工艺,桩端持力层为中砂,低应变反射波法实测波形如图,判定桩身扩颈位置接近()。

A.9m 

B.11m

C.10m 

D.12m

题型:填空题

重型肝炎的诊断要点下列哪项不正确:

A.消化道症状严重

B.肝脏进行性缩小

C.黄疸迅速加深,血清总胆红素值>165μmol/L

D.迅速出现精神、神经症状

E.可并发凝血功能障碍,出现全身出血倾向

题型:填空题

Kofi Annan says helping survivors of last week’’s earthquake and (1)________in the Indian Ocean is (2)________. The United Nations secretary-general says countries that have offered aid must (3)________and provide it. The offers add up to around (4)________dollars. United Nations officials say (5) ________of that is needed during the next six months.The concern about offers of international aid is (6)________. For example, the earthquake in Bam, Iran, in (7)________of 2003 killed more than (8) ________people. Countries and groups offered hundreds of millions of dollars (9) ________. The United Nations says it has (10)________only about (11)________dollars in aid received so far. Governments and organizations that offered help (12) ________that, however.On (13)________Mr. Annan met with world leaders in Jakarta, Indonesia to discuss aid for (14)________. The leaders discussed and (15)________the idea of (16)________owed by affected nations. But the leaders did not say they would do so. Some said that (17)________to survivors would be more helpful.Representatives of (18)________countries and international organizations attended the meeting in Jakarta. Officials say they will cooperate to develop (19)________ for the Indian Ocean and the (20)________.

题型:填空题

分离器或滤波器是利用语音信号和ADSL数据信号在()上的差别将它们分开的。

A、时间

B、频率

C、速率

D、时间和频率

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