1.选择题- (共17题)
{#blank#}1{#/blank#} {#blank#}2{#/blank#}playing soccer this afternoon?
Everyone knows that exercise is important. We all need to exercise. Doctors say it's good for us. It keeps body strong.
When the daytime comes, we must get up. This is the time for exercise. Exercise means doing things with the body. There're many ways to exercise. You can walk, run, swim, skate, or play ball games. Make sure you exercise in the following(下面的)ways: You have to like what you're doing. Exercise enough—but not too much. It's good to exercise twice each week. Thirty minutes each time is enough. Try all kinds of things until you find one, two or three sports that feel right for you.
Exercising can be fun. Friends can exercise together at a fitness center, or they can play sports together. How do you exercise?
根据短文内容,选择正确答案。
{#blank#}1{#/blank#} there {#blank#}2{#/blank#} more pollution?
{#blank#}1{#/blank#} there {#blank#}2{#/blank#} more pollution?
He {#blank#}1{#/blank#} {#blank#}2{#/blank#} computer games.
Do you know what a resolution is? It' a kind of promise. Most of the time, we make promises to other people. (“Mom, I promise I'm going to tidy my room when I get back from school.”) However, promises you make to yourself are {#blank#}1{#/blank#}(resolution), and the {#blank#}2{#/blank#} (common) kind is New Year's resolutions. The start of the year is often a time for making resolutions. When we make resolutions at the {#blank#}3{#/blank#} (begin) of the year, we hope that we are going to improve our {#blank#}4{#/blank#} (life). Some people write down {#blank#}5{#/blank#} (they) resolutions and plans for the coming year. This helps them to remember their resolutions. {#blank#}6{#/blank#} (other) tell their family and friends about their wishes and plans.
There are different kinds of resolutions. Some are about physical health. For example, some people promise themselves they are going {#blank#}7{#/blank#} (start) an exercise program or eat less fast food. Many resolutions have to do with self-improvement. These are about {#blank#}8{#/blank#} (make) yourself a better person. Some people might say they are going to take up a hobby like painting or taking photos, or {#blank#}9{#/blank#} (learn) to play the guitar. Some resolutions have to do with better planning, like making a weekly plan for schoolwork. For example, a student may have to find more time to study.
Although there are differences, most resolutions have one thing in common. People hardly ever keep them! There are good reasons for this. Sometimes the resolutions may be too difficult {#blank#}10{#/blank#} (keep). Sometimes people just forget about them. For this reason, some people say the best resolution is to have no resolutions! How about you—will you make any next year?
Here's a shopping receipt(收据) of Linda.
Jiulong Great World 18 Huanghe North Road Suqian City,223800 |
13/04/2012 15:17PM Number Item(物品) Product# Price 1 Pair of trousers 3597981144 ¥ 150.00 3 Pairs of socks 8294653379 ¥ 10.00/each 1 Sweater 3607889911 ¥ 375.00 Total ¥ 555.00 WELCOME NEXT TIME! |
根据以上内容,选择正确答案。
2.单选题- (共14题)
A.H2SO3溶液能使紫色石蕊变红 |
B.1个H2SO3分子中含1个SO2分子 |
C.H2SO3的相对分子质量为82g |
D.H2SO3的S元素的质量分数为![]() |
A.用燃着的木条区分氧气和二氧化碳 |
B.用盐酸验证敞口放置的NaOH溶液已变质 |
C.用盐酸除去石灰水中的少量CaCO3 |
D.用盐酸除去铁钉表面的少量铁锈 |
A.过滤或加热均能使硬水转化为软水 |
B.活性炭的吸附作用可使海水转化为淡水 |
C.电解水得到的H2和O2质量比为2:1 |
D.液态水变成水蒸气,分子间间隔增大 |
A.生铁、硬铝、焊锡都属于合金 |
B.铜有良好的导电性,因而大量用于制作电线 |
C.铝表面易生成致密氧化铝薄膜,因而具有良好的抗腐蚀性 |
D.锈蚀后的铁制品没有回收价值 |
A.m(溶质):m(溶剂)=20:120 |
B.溶质的质量分数为20% |
C.升温后,溶质的质量分数增大 |
D.降温后,有固体析出 |
A.向H2SO4溶液中滴加Ba(OH)2溶液 |
B.向Mg(NO3)2溶液中滴加Na2SO4溶液 |
C.将浓硫酸加入蒸馏水中并不断搅拌 |
D.将(NH4)2SO4和熟石灰混合研磨 |
3.填空题- (共6题)
(1)①Cu(NO3)2溶液和CuSO4溶液都含有大量___________填离子符号)。
②向Cu(NO3)2溶液中加入NaOH溶液,充分振荡。反应的化学方程式为______________。
③向CuSO4溶液中加入过量的锌片,充分反应后,可看到的现象是___________________,下图表示该反应前后溶液中存在的主要离子,请写出每种图形代表的离子(填离子符号)




(2)除上述实验外,在溶液中与Cu(NO3)2和CuSO4均能反应的物质还有_______、_______
(任举二例,填化学式,下同);
(3)在溶液中能与CuSO4反应而不与Cu(NO3)2反应的物质有___________(任举一例)。
(1)1个CO分子变成1个CO2分子需要得到_____个O原子。
(2)1个O2分子与____个CO分子完全反应生成CO2。
(3)四氧化三锰的化学式为_______,1个四氧化三锰“分子”与____个CO分子完全反应生成Mn和CO2,高温下发生该反应的化学方程式为______________________________。

(1)甲装置中,在水面下松开橡皮塞,一段时间后可观察到的现象是________________。
(2)收集一瓶SO2,按乙装置组装仪器,打开活塞K,向长颈漏斗加水至如图位置,关闭活塞K,一段时间后可观察到的现象是___________________。
(1)细铁丝在氧气中点燃发生剧烈燃烧,化学方程式是______________________________。
(2)将镉丝插入下列溶液有明显现象的是__________(填序号)。
①NaCl溶液 ②HCl溶液 ③AgNO3溶液 ④NaOH溶液
(3)镍镉电池应用广泛,为了防止污染环境,将废旧镍镉电池中回收镉的一种方法如下:
步骤1:将废旧电池破碎成细颗粒后培烧,将镉转化为氧化镉(CdO);
步骤2:将含氧化镉的细颗粒和炭粉混合后,隔绝空气加热至1200℃,可得镉蒸气和一氧化碳。
步骤2中氧化镉变成镉的化学方程式是____________________________________。
1600℃ |
(1)镁元素在自然界中是以 (填“单质”或“化合物”)形式存在。(2)工业制镁的一种原理是2MgO+Si+2CaO ====== 2Mg↑+Ca2SiO4,抽走容器中的空气对反应有促进作用,且能防止空气中的物质与Mg反应使产品混有 (填化学式)。
(3)制镁的原料MgO可从海水中获得。小华利用镁与盐酸反应后的废液,模拟从海水中获取MgO的过程,实验如下:
步骤1:向上述废液中,边搅拌边分批加入CaO,至MgCl2完全沉淀为止,过滤得Mg(OH)2固体。共消耗8.4g CaO。
步骤2:将Mg(OH)2固体加热分解为MgO和水,所得MgO的质量为4.0g 。
①步骤2中Mg(OH)2分解的化学方程式为 。
②通过所得MgO的质量计算上述废液中含MgCl2的质量m= g。
③分析实验数据,可知步骤Ⅰ中反生的化学反应有:
CaO+H2O==Ca(OH)2;Ca(OH)2+MgCl2==CaCl2+Mg(OH)2↓; 。
(1)2013年12月广州建业大厦发生严重火灾。从燃烧条件分析,大厦内存放的大量鞋、纸箱等物品充当了________________。
(2)高层建筑物通常设计了灭火用的洒水系统。从灭火原理分析,洒水的作用主要是______________。
(3)分析下表中的数据,回答问题:
物质代号 | L | M | N | P |
熔点/℃ | -117 | 3550 | 44 | -259 |
沸点/℃ | 78 | 4827 | 257 | -253 |
着火点/℃ | 510 | 370 | 40 | 580 |
①有人认为“物质的熔、沸点越高,着火点越高”,该结论_______________(填“合理”或“不合理”)。

②已知酒精灯火焰的温度约为500℃。利用上图装置,验证达到可燃物着火点是燃烧的条件之一,上表中可用于完成该实验的两种可燃物是_________和________(填代号)。
4.实验题- (共2题)

(1)“滤渣”是粗盐中含有的 。
(2)实验过程中四次用到玻璃棒,分别是:
第一次:溶解时搅拌;
第二次: ;
第三次: ;
第四次:将精盐从蒸发皿转移出来。
(3)本实验从滤液得到精盐,采用的是蒸发溶剂的方法而不用降低溶液温度的方法,参考溶解度曲线图分析的原因:

(4)看图可知,200C时NaCl的溶解度为 g,本实验溶解3.6g的粗盐,蒸馏水的最佳使用量约为 ml.增加蒸馏水的用量虽然能加快粗盐的溶解,但会引起的不良后果是 。
限选试剂:稀HCl,稀H2SO4,BaCl2溶液,AgNO3溶液,蒸馏水
(1)提出合理假设。所抽样品的成分有4总共可能:
假设1:KCl和 NH4HCO3;假设2:KCl和NH4Cl;
假设3:K2SO4和 NH4HCO3;假设4: 。
(2)形成设计思路。
①甲同学先提出先用AgNO3溶液确定是否含有KCl,你是否同意并说出理由: 。
②乙同学提出先确定是否含有NH4HCO3,则可以选择的试剂是 。
(3)完成实验方案。请填写实验操作,与表中结论相符的预期现象。
实验操作 | 预期现象 | 结论 |
步骤1: | | 假设2成立 |
步骤2: | |
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【1】题量占比
选择题:(17道)
单选题:(14道)
填空题:(6道)
实验题:(2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:14
7星难题:0
8星难题:8
9星难题:0