今年五月一日起实施的新交通法规加大了对酒后驾车的处罚力度．测_爱下问搜题

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问题选择题

今年五月一日起实施的新交通法规加大了对酒后驾车的处罚力度．测试酒精既可用电子仪器，又可用化学方法．某兴趣小组利用物质颜色变化验证酒精的存在，其做法是：向盛有硫酸溶液的试管中加入少量的红棕色三氧化铬晶体（Cr0₃），然后向其中滴加酒精，生成了绿色硫酸铬溶液[Cr₂（SO₄）₃]和CO₂气体．下列叙述正确的是（　　）

A．反应前后Cr元素的化合价分别为+6、+3

B．Cr0₃是还原剂

C．反应前后Cr元素的化合价分别为+3、+6

D．CO₂是氧化剂

答案

A、根据化合物中元素的正负化合价的代数和为0

三氧化铬中Cr元素的化合价为x，

x+（-2）×3=0

解得x=+6

根据硫酸根显-2价，设硫酸铬中Cr元素的化合价为y，

y×2+（-2）×3=0，

解得y=+3

B、三氧化铬被还原是氧化剂；故错

C、反应前后Cr元素的化合价分别为+6、+3；故错

D、二氧化碳是生成物，氧化剂还原剂是对反应物来说的；故错

故选A．

问答题

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.

该合同所遵循的标准的汉文名称是什么？

名词解释

脑干网状结构