1.单选题- (共8题)
| A．柠檬酸属于氧化物 |
| B．柠檬酸是由6个碳原子、8个氢原子和7个氧原子组成的 |
| C．柠檬酸中氧元素的质量分数最大 |
| D．柠檬酸中碳、氢、氧三种元素的质量比为6：8：7 |
| A．物质溶于水放热或吸热取决于扩散与水合过程的相对强弱 |
| B．生产普通玻璃的原料是石英砂、烧碱、石灰石 |
| C．凡是均一、稳定的液体都是溶液，溶液中只能有一种溶质 |
| D．空气按体积比计算氧气氧气最多，氮气次之 |
| ①C→CO→CO2 | ②Cu→CuO→CuSO4 | ||
| ③Na2CO3→NaCl→NaNO3 | ④CaCO3→CaO→Ca(OH)2 | ||
| A．①②③ | B．①③④ | C．①②④ | D．①②③④ |
A. A B. B C. C D. D
| 选项 | 实验目的 | 实验方案 |
| A | 除去铁粉中混有的少量银粉 | 用足量稀盐酸溶解后过滤 |
| B | 鉴别纯羊毛织品和涤纶织品 | 取样灼烧后闻气味 |
| C | 证明分子在不断运动 | 将一滴红墨水滴入一杯纯净水中 |
| D | 收集二氧化碳时，检验集气瓶是否集满 | 用一根燃着的木条放在集气瓶口 |
A. A B. B C. C D. D
A. 硫在氧气中燃烧产生明亮的蓝紫色火焰
B. 消防队员用水降低可燃物的温度来灭火
C. 洗洁精具有乳化作用，能去除餐具上的油污
D. 合金的硬度比组成它们的纯金属的硬度小
A B C D
| A．用等质量、等浓度的过氧化氢溶液在有无催化剂条件下制氧气 |
| B．一定质量的红磷在密闭容器中燃烧 |
| C．向等质量、等浓度的稀硫酸中分别逐渐加入锌粉和铁粉 |
| D．向一定质量的氯化铜和稀盐酸的混合溶液中逐滴加入氢氧化钠溶液 |
2.选择题- (共7题)
A. show me the building, B. was rising , C. make a living, D. could hardly sleep E. took my taxi F. pay you |
Twenty years ago, I drove a taxi for a living. One time in the middle of the night, an old lady in her 80s {#blank#}1{#/blank#} . She gave me an address, and then asked, “Could you {#blank#}2{#/blank#}?”
“It's not the shortest way,” I answered quietly .
“Oh, I don't mind,” she said. “I'm in no hurry. I'm on my way to a hospice(临终医院). I {#blank#}3{#/blank#} The doctor says I don't have very long.”
I quickly reached over and shut off the meter(计价器). For the next two hours, we drove through the city. She{#blank#}4{#/blank#}where she had once worked, the neighborhood where she had lived, the place where she danced as a girl. As sun {#blank#}5{#/blank#}, we got to the hospice.
“How much should I {#blank#}6{#/blank#}?” she asked, reaching into her purse.
“Nothing ” I said.
“You have to{#blank#}7{#/blank#} ” she answered.
“Oh, there are other passengers,” I answered.
“You gave an old woman some moment of happiness”. She said: “Thank you.”
I drove into the fine morning light. Behind me, a door shut. It was the sound of closing of a life. I drove aimlessly, lost in thought. For the rest of the day, I {#blank#}8{#/blank#}. What if that woman had got an unfriendly drive, or one who was impatient to his shift? What if I had refused to take the run?
A. show me the building, B. was rising , C. make a living, D. could hardly sleep E. took my taxi F. pay you |
Twenty years ago, I drove a taxi for a living. One time in the middle of the night, an old lady in her 80s {#blank#}1{#/blank#} . She gave me an address, and then asked, “Could you {#blank#}2{#/blank#}?”
“It's not the shortest way,” I answered quietly .
“Oh, I don't mind,” she said. “I'm in no hurry. I'm on my way to a hospice(临终医院). I {#blank#}3{#/blank#} The doctor says I don't have very long.”
I quickly reached over and shut off the meter(计价器). For the next two hours, we drove through the city. She{#blank#}4{#/blank#}where she had once worked, the neighborhood where she had lived, the place where she danced as a girl. As sun {#blank#}5{#/blank#}, we got to the hospice.
“How much should I {#blank#}6{#/blank#}?” she asked, reaching into her purse.
“Nothing ” I said.
“You have to{#blank#}7{#/blank#} ” she answered.
“Oh, there are other passengers,” I answered.
“You gave an old woman some moment of happiness”. She said: “Thank you.”
I drove into the fine morning light. Behind me, a door shut. It was the sound of closing of a life. I drove aimlessly, lost in thought. For the rest of the day, I {#blank#}8{#/blank#}. What if that woman had got an unfriendly drive, or one who was impatient to his shift? What if I had refused to take the run?
3.填空题- (共2题)
①蛋白质是构成细胞的基本物质，是机体生长和修补受损组织的主要原料。处于生长发育期的青少年每天需要较多的蛋白质。下列物质中富含蛋白质的有 （填字母）。
②“食品安全”是一个永恒的话题。你认为下列认识不科学的是 (填字母)。
| A．任何食品都不可以使用食品添加剂 |
| B．霉变的大米、花生，即使经过蒸煮也不能食用 |
| C．含钙、锌的奶粉有利于补充人体所需的常量和微量元素 |
| D．用亚硝酸钠代替食盐来腌渍食品 |
（2）“科技创新、材料发展”极大地促进了人类社会的进步。
①“辽宁号”航母的服役举世瞩目。钢铁是制造航母的主要材料，它易水与空气中的 等发生反应而锈蚀，请你列举一种防止钢铁锈蚀的方法 。
②可降解塑料的问世，既方便了生活，又减少了“白色污染”。塑料属于 材料（填“复合”或“合成”）。
⑴下列说法不正确的是(填字母)___________。
| A．过滤池可以除去难溶性杂质 |
| B．活性炭吸附池可以除去水中的色素和臭味 |
| C．清水池中一定是软水 |
⑶目前不少自来水用液氯(Cl2)作为消毒剂，液氯注入水后发生反应的示意图：
①C物质的水溶液能使紫色的石蕊溶液变成________色。取C物质的水溶液少许，向其中加入稀硝酸和硝酸银溶液，观察到有白色沉淀产生，发生反应的化学方程式是_________________，利用此法可检验自来水中是否含有Cl—。
②液氯与水反应的化学方程式是__________________________。
⑷天然水中微生物使有机物(以C6H10O5表示)转化为CO2和H2O的过程中所需O2的量叫做生化需氧量(BOD，单位为mg/L)。反应的化学方程式为：C6H10O5+6O2
6CO2+5H2O。测得20℃时1L某天然水样中含有机物(C6H10O5)的质量为10.8mg，则该水样的BOD值是_____？(写出计算过程)4.实验题- (共1题)
(1)从海水中提取出的粗盐中除了NaCl外，还含有泥沙等杂质。请完善下列实验室中除去泥沙等杂质的实验步骤，并回答相关问题：
其中操作1的名称是________；在过滤操作中要用到的玻璃仪器有烧杯、玻璃棒 、_________(填仪器名称)；在加热蒸发过程中，当蒸发皿中_______时，停止加热。
(2)上述除去泥沙后的澄清滤液中，还含有Ca2+、Mg2+等阳离子。要想知道该滤液是硬水还是软水，可加入__________进行检验。
(3)海水提取出粗盐后的母液中，还含有较多的氯化镁，用氯化镁可制得金属镁。工业上从母液中提取氯化镁的过程如下：
反应1的基本反应类型是_________；物质X是___________(填名称)。
(4)工业上可用电解饱和NaCl溶液的方法制得烧碱、氯气和氢气，请写出该反应的化学方程式：___________；
(5)从下列装置中选择并组装一套制取干燥氢气的装置，正确的连接顺序为_______(用接口处字母填写)。
写出一个在实验室中用加热法制取氧气的化学方程式：___________。
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【1】题量占比
单选题:(8道)
选择题:(7道)
填空题:(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：8
7星难题：0
8星难题：2
9星难题：0