“建设新农村.开辟新能源”是我市新农村建设主题之一.沼气的开发和利用(如图)是解

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问题:

“建设新农村.开辟新能源”是我市新农村建设主题之一.沼气的开发和利用(如图)是解决农村能源不足问题的一条重要途径.同时有利于改善农村的环境卫生,提高农家肥料的质量.请回答:

(1)沼气的主要成分是______(填名称),其化学式是______;

(2)写出甲烷燃烧的化学方程式______;

(3)沼气中除含有甲烷外,还含有少量CO2、H2、H2S、CO、水蒸气等.沼气略带臭味,请你分析臭味可能来自______气体;

(4)从安全方面考虑,使用沼气时,一定要防止______混入沼气中,以免发生爆炸事故.

考点:燃料的利用和新能源的开发化学反应方程式的书写文字表达式爆炸、自燃物理性质和化学性质的区别和应用
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密钥的完整性保护可以采用()实现。

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根据以下业务背景资料,回答(一)~(五)题的相关问题。2010年7月1日,上海进出口贸易公司(SHANGHAI IMPORT AND EXPORT CO., LTD.)与澳大利亚客户(MANDARS IMPORTS CO.,LTD)签订了一份出口女式牛仔裙(.Ladies Denim Skirt)的合同(合同号为PU20107),并指派外贸跟单员小王负责此笔业务跟单合同的主要内容如下:Fabric & Construction : 99% cotton 1% polyester with spandex 11S ×16S +70D/88×46 Washing: Stone washed Packing: Flat pack, 1 piece/polybag1 dozen into a big polybag, assorted sizes per polybag, 4 big polybags into an export carton. Export carton must be p. Maximum sizes of export cartons: Length Width Heightcm 60 42 48 ColourBlue/grey Shipping mark of the cartons As per our information Hangtag: MANDARS Main label: MANDARS Washing label: With correct compositon & washing instruction Samples: Pre-production samples: 3 pieces in size 38 before 15th July,2010(ETD Shanghai)by DHL The pre-production samples should be made after the fabric has been tested and passed by STR Shanghai Branch, (上海胜邦质量检测分公司)then will be sent to customer’s quality assurance department. “GO” for production can only be given after their approval. Lab Dip samples:as confirmed by our assurance quality department on 5th July,2010 Shipping samples: 2 pieces in size 38 on/about 5 days after shipment Payment: 30 % deposit with order by T/T, the balance against copy of B/L Price terms & total amount: USD 8.00 per piece FOB Shanghai, USD144000.00 Quantity: 18000 pieces, size and color assortment:

5% more or less in the quantity and amount are allowed. Shipment: 20th August, 2010 from Shanghai to Sydney, Australila by COSCO as carrier , partial and transshipment allowed Shipping agent: Shipment should be made by Shanghai Jingde Int’l Forwarding Co.,Ltd.. Tel86-21-62228123,AttnMr.Liu Purchase conditions: All garments manufacturers must meet the minimum manufacturing standards, comply with the SA8000 and all garments should be AZO-free and no nickel in press buttons is used.

该合同要求,女式牛仔裙禁止使用哪些材料/辅料?

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关于子痫前期重度的产科处理原则,哪项是错误的

A.妊娠终止24小时后,子痫即不可能发生

B.重症患者为尽早结束分娩可行剖宫产术

C.不足36周若胎盘功能减退表明胎儿危象,应终止妊娠

D.不足36周若治疗后孕妇病情继续恶化,应终止妊娠

E.超过36周者应及时终止妊娠

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某食品制造公司(一般纳税人),2009年12月从农场购入大米一批40吨,税务机关批准使用的收购凭证上注明收购金额为390000元。本月该食品公司将30吨大米用于本企业生产儿童食品米饼,全部销售取得不含税销售额600000元;将2吨大米作为元旦礼品发给本厂职工。则该食品公司当月应纳增值税税额为( )元。

A.50000
B.45000
C.53835
D.51300

题型:填空题

油品损耗原因有很多,其中损耗数量最大和最常见的是()

A.漏损

B.混油损失

C.蒸发损麓

D.清理储油、输油设备损耗

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