在被分离的混合液中加入第三组分,利用原混合物中各组分在第三组分中溶解度的差异来分离混 发布时间:2019-07-25 14:47 │ 来源:www.tikuol.com 题型:单项选择题 问题: 在被分离的混合液中加入第三组分,利用原混合物中各组分在第三组分中溶解度的差异来分离混合物的操作叫()。A、恒沸蒸馏B、水蒸汽蒸馏C、精馏D、萃取蒸馏
题型:单项选择题 Healthy Food ParisSpinach + OrangesAlthough spinach(菠菜) has lots of iron, your body doesn’t absorb(吸收) it well when spinach is eaten alone.But with vitamin(维生素) C by its side, this vegetable becomes a true hero. Avocado + Tomato Tomatoes are a super food. Eat some avocado(鳄梨) at the same time and you’ve got a super super food, because the fat in the avocado helps the body absorb seven times more lycopene(番茄红素). Green Tea + Lemon Drinking several cups of green tea is a good habit, because it can protect your heart. But if you intake some vitamin C at the same time, it can’t be better. The vitamin C in lemons helps your body absorb 13 times more catechins(儿茶酚) than it can get from tea alone.小题1: Which food pair is correct when you eat according to the passage?A.Catechins + LycopeneB.Avocado+Oranges.C.Black tea+LemonD.Spinach+Lemon小题2: Why do we eat oranges with Spinach?A.Because Spinach has lots of iron.B.Because oranges have much vitamin C which can help absorb iron in spinach.C.Because vegetables should be eaten with fruits.D.Because vegetables should be eaten with fruits.小题3: What can help body absorb more lycopene?A.Fat in the avocado B.Vitamin C in oranges C.Vitamin C in tomatoes D.Fat in tomatoes小题4: Which of the following pairs do not need vitamin C to help?A.Spinach and orangesB.Avocado and tomatoC.Green tea and lemonD.Oranges and tomato小题5: If Henry’s father has something wrong with his heart, which choice is best of for his health?A.SpinachB.OrangesC.TomatoD.Green tea 查看答案
题型:单项选择题 某企业有1座钢结构工业厂房和1栋钢筋混凝土结构办公楼。厂房建筑物重置价为3000万元,耐用年限为50年,已使用4年,残值率为5%。评估人员采用观察法确定该厂房主体结构、装修和设备部分的损耗率分别为1%、30%和35%,相应的评分修正系数分别为0.75、0.10和0.15。办公楼也已使用4年。经现场查勘,办公楼主体结构部分良好,门窗修复费用为10万元;室内装修重置价为480万元,平均寿命为8年,不考虑残值率;设备更新改造费用为150万元。要求:(1)说明钢结构构件损伤检测的内容。(2)分别应用使用年限法和观察法计算厂房建筑物的成新率。(3)假定使用年限法权重40%,观察法权重60%,按综合法计算厂房建筑物的成新率和评估价值。(4)根据办公楼室内装修重置价、门窗修复费用和设备更新改造费用,计算室内装修部分的损耗及主体结构以外的损耗总额。(涉及金额的,以万元为单位,计算结果保留2位小数) 查看答案
题型:单项选择题 读美国东北部工业区和我国东北部工业区比较图4,回答题。图4小题1:两工业区的主导因素相同,均为 A.便利的海运B.接近原料和能源C.先进的科技D.广阔的市场小题2:两个工业区的农业地域类型不同,下列叙述正确的是 A.美国东北部本着因地制宜的原则,发展商品谷物农业B.中国东北部为解决人多地少的矛盾,发展了季风水田农业C.美国东北部本着面向城市市场的原则,发展乳畜业D.中国东北部本着支援全国的原则,种植了大豆 查看答案