防治瓦斯爆炸的措施有()A、防止瓦斯积聚 B、防止瓦斯引燃 C、防止瓦斯灾害扩大 D、使用

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问题:

防治瓦斯爆炸的措施有()

A、防止瓦斯积聚

B、防止瓦斯引燃

C、防止瓦斯灾害扩大

D、使用不燃性材料和制品

考点:瓦斯抽放工瓦斯抽放工题库
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根据汉语注释,在下列句子的空白处写出各单词的正确形式,每空一词。

小题1:I started getting better. My friends noticed a change in my ____________(态度).

小题2:The buildings in the exhibit include the World Trade Center in New York that was ____________(毁坏) in the terrorist attacks.

小题3:I like to stay up until ____________(午夜) or even later on my natural clock.

小题4:It was not possible to travel ____________(直通的;直接地) through because of the Rocky Mountains and the deep snow that fell in winter.

小题5:She often spoke about the problems of women trying to ____________(成功)in a world mainly controlled by men.

小题6:Experts say the best way to prevent the diseases carried by mosquitoes is not to be ____________(叮咬) by one.

小题7:He was a member of the ____________(设计) team and became chief engineer of the building project in eighteen sixty-seven.E:\ZuJuan\WCFUpload\Upload\Program Files\Youdao\Dict\5.3.40.8020\resultui\queryresult.html

小题8:Both of those industries ____________(雇佣) high percentages of women.

小题9:The conference centered on three main problems to getting and keeping girls in school: violence,poverty and poor ____________(素质) education.

小题10:But this is a ____________(精选; 大选) group of people that can handle or process or engage in these types of activity.

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如右图所示,在250mL干燥的圆底烧瓶中,充满CO2气体,并用带尖嘴导管的单孔塞塞紧(导管另一端的橡胶管事先用夹子夹紧)。实验开始时,先将注射器中的浓氢氧化钠溶液推入到烧瓶中,一段时间后,打开夹子,会观察到的现象有(1)              ,用理化知识解释产生上述现象的原因是(2)                    

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胡 * * * * 在庆祝建党九十周年的讲话中指出,在新的历史条件下,提高党的建设科学化水平,必须大力推进马克思主义的中国化时代化科学化。()

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女性,32岁。经常肝区疼痛一年余、肝功能异常。通过血清学检查及肝穿刺组织活检,诊断为慢性活动性肝炎,对此例肝活检病变的描述,错误的是

A.肝细胞可见碎屑状坏死

B.可见桥接状坏死

C.可见肝细胞增生

D.可见大片肝细胞坏死

E.可见门管区有炎症细胞浸润

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商业汇票分为商业承兑汇票和银行承兑汇票,其中银行承兑汇票是指由付款人签发并承兑,或由收款人签发交由付款人承兑的汇票。

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