1.选择题- (共5题)
Clothing(服装) is a language. We can look at the traditional clothing to know more about culure.
Africa has a long history and a rich culture, and this is shown in traditional dress. The three colours—red, gold and green, are often used in the clothing. The first colour represents the blood of millions of people who fought for freedom; the second, rich resources of the African earth; and the third, the grassland of home.
Because clothing has strong social meanings, people are very careful in choosing what to wear. It would be a serious mistake to wear the wrong clothes, or to dress in the wrong way. For example, in Ghana, a woman should wear her waistband (腰带) differently according to the importance of the social event.
Traditional dress also tells us about everyday life. African designs are famous for loose (宽松的) clothing. The temperature there can be very high during the daytime but very low at night, so it requires that the clothes are comfortable for daily life.
Today although more and more young people like wearing Western clothes, especially in big cities in Africa, traditional African dress is still quite valuable. This is because it has deep cultural meanings.
Traditional Dress in Africa | |
Different colours | The three most {#blank#}1{#/blank#} colours used in clothing are red, gold and green. Different colours {#blank#}2{#/blank#} for different things: the blood of freedom fighters, resources of the earth and the grassland of home. |
Social meanings | Because clothing has strong social meanings, people have to choose what to wear {#blank#}3{#/blank#} Women in Ghana even wear different waistbands according to how important the event is. |
Everyday life | Because the temperature {#blank#}4{#/blank#} greatly, clothes are usually loose and comfortable. Though Western clothes are popular with young people in some areas, traditional clothes are still of great {#blank#}5{#/blank#} |
2.单选题- (共2题)
①铁在过量氧气中燃烧生成Fe2O3
②铝在常温下不能与氧气反应
③能用同一离子方程式表示:浓氨水滴入Al2(SO4)3溶液和Al2(SO4)3溶液滴入浓氨水的反应
④铝粉与氧化镁共热可制取金属镁
⑤用过量氨水除去Fe3+溶液中的少量Al3+
⑥除去Al(OH)3中混有的少量Mg(OH)2:加入过量的烧碱溶液充分反应,过滤,向滤液中通入过量CO2后过滤
⑦除去FeCl2溶液中混有的FeCl3:加入过量铜粉,过滤
⑧生铁、普通钢和不锈钢中的碳含量依次增加
| A．①②⑤⑦ | B．②③⑥⑧ | C．②④⑥⑦ | D．③⑥ |
| A．绚丽缤纷的烟花中可能添加了含钾、钠、钙、铜等某些金属元素的化合物 |
| B．燃放烟花爆竹时的主要污染物是CO、CO2、SO2、烟尘等物质 |
| C．燃放烟花爆竹时只发生了化学变化,没有物理变化 |
| D．为了保证燃放烟花爆竹时的空气质量,应该同时进行人工降雨除掉污染物 |
3.实验题- (共1题)
(1)生铁中含有一种铁碳化合物X(Fe3C)。X在足量的空气中高温煅烧,生成有磁性的固体Y,将Y溶于过量盐酸的溶液中含有的大量阳离子是 。(2)某溶液中有Mg2+、Fe2+、Al3+、Cu2+等四种离子,向其中加入过量的NaOH溶液后,过滤,将滤渣高温灼烧并将灼烧后的固体投入过量的稀盐酸中,所得溶液与原溶液相比,溶液中大量减少的阳离子是 。A.Mg2+B.Fe2+
C.Al3+D.Cu2+
(3)氧化铁是重要工业颜料,用废铁屑制备它的流程如下:
回答下列问题:
①操作Ⅰ的名称是 ,操作Ⅱ的名称是 。②写出在空气中煅烧FeCO3的化学方程式 。(4)有些同学认为KMnO4溶液滴定也能进行铁元素含量的测定。
a.称取2.850 g绿矾(FeSO4·7H2O)产品,溶解,在250 mL容量瓶中定容;
b.量取25.00 mL待测溶液放入锥形瓶中;
c.用硫酸酸化的0.010 00 mol·L-1KMnO4溶液滴定至终点,消耗KMnO4溶液体积的平均值为20.00 mL。
①实验前,首先要精确配制一定物质的量浓度的KMnO4溶液250 mL,配制时需要的仪器除天平、玻璃棒、烧杯、胶头滴管外,还需 。②某同学设计的下列滴定方式,最合理的是 。(夹持部分略去)(填字母序号)
③写出滴定过程中反应的离子方程式 。④计算上述样品中FeSO4·7H2O的质量分数为 。
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【1】题量占比
选择题:(5道)
单选题:(2道)
实验题:(1道)
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【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：0
5星难题：0
6星难题：2
7星难题：0
8星难题：1
9星难题：0