1.单选题- (共9题)

试推断X的化学式,并计算总面积为1.76 m2的叶片10个晴天可以合成X的质量(每平方米叶片每天吸收5 g二氧化碳)
选项 | X化学式 CH2O CH2O C6H12O6 (C6H10O5)n X的质量/ g 24 30 60 88
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A.图中能表示氢分子的是“![]() |
B.反应前后,原子的种类、数目不变 |
C.该反应中共涉及两种单质和两种化合物 |
D.该反应中参加反应的两种分子的个数比为1:1 |
A.MBBA由三种元素组成 | B.一个MBBA分子中共含有39个原子 |
C.MBBA中氢元素质量分数最大 | D.MBBA中碳、氧元素质量比为27:2 |
A. +2 B. +3 C. +4 D. +6
A.1660 mL | B.1803.2 mL | C.4600 mL | D.4636.8 mL |
2.选择题- (共10题)
阅读理解
Why do we read poetry? First obvious one: because we enjoy it. The only other reason is for academic purposes, and that's not why this is here.
Many of us read poetry simply because we often feel depressed and hopelessly lost, and in poetry we see how beautiful and strange everything is. So in that way poetry calms our anxiety.
There are many different kinds of poems. They are not all calming. Some poems make me anxious, angry, scared, and sad, which is why I value them. As a reader, I want a full meal, not just dessert. I want the sweet and the bitter. Often, I read poetry when I'm already relaxed. In fact, I read more when I'm not stressed out.
Here are the main reasons I respond to poetry, as far as I can tell. Metrical(格律的) poems are about setting up rules and then bending them. Usually, this is done by setting up a rhythm and then violating it or almost violating it. And then returning to it again. This satisfies my desire for order and also my desire for testing boundaries.
Poetry plays with language and often slams words together in surprising ways, which is thrilling the way food can be when the chef has paired ingredients you never thought would taste good together but somehow do.
Many poems are dense. Words mean two or three things at once and lots of suggestions are packed between the lines. This is intellectually inspiring and it allows me to read the same poem over and over always finding new things in it.
And, of course, there's the subject matter. It interests me just as it would if the same subject was explored in a story or essay. Not all poems interest me in this way, but then not all stories and essays do, either.
根据短文内容,选择最佳答案,并将选定答案的字母标号填在题前括号内。
阅读理解
Why do we read poetry? First obvious one: because we enjoy it. The only other reason is for academic purposes, and that's not why this is here.
Many of us read poetry simply because we often feel depressed and hopelessly lost, and in poetry we see how beautiful and strange everything is. So in that way poetry calms our anxiety.
There are many different kinds of poems. They are not all calming. Some poems make me anxious, angry, scared, and sad, which is why I value them. As a reader, I want a full meal, not just dessert. I want the sweet and the bitter. Often, I read poetry when I'm already relaxed. In fact, I read more when I'm not stressed out.
Here are the main reasons I respond to poetry, as far as I can tell. Metrical(格律的) poems are about setting up rules and then bending them. Usually, this is done by setting up a rhythm and then violating it or almost violating it. And then returning to it again. This satisfies my desire for order and also my desire for testing boundaries.
Poetry plays with language and often slams words together in surprising ways, which is thrilling the way food can be when the chef has paired ingredients you never thought would taste good together but somehow do.
Many poems are dense. Words mean two or three things at once and lots of suggestions are packed between the lines. This is intellectually inspiring and it allows me to read the same poem over and over always finding new things in it.
And, of course, there's the subject matter. It interests me just as it would if the same subject was explored in a story or essay. Not all poems interest me in this way, but then not all stories and essays do, either.
根据短文内容,选择最佳答案,并将选定答案的字母标号填在题前括号内。
3.填空题- (共2题)
⑴ 下列用途中,主要利用了物质的物理性质的有 。(填序号)
①将小块金刚石镶在玻璃刀头上用来裁玻璃; ② 将石墨用于制作电极;
③一氧化碳用作气体燃料; ④干冰用于人工降雨; ⑤一氧化碳可用于炼铁。
⑵ 干冰的物质类型不属于 。(填序号)
A.混合物 | B.纯净物 | C.化合物 | D.氧化物 |
⑷ 一氧化碳燃烧时火焰呈蓝色,该反应的化学方程式为 。
⑸ 在汽车尾气系统中装置催化转化器,可将一氧化碳和一氧化氮有毒气体转化为无毒的二氧化碳和氮气,该反应的化学方程式为 。
⑹ 某生态农业对农家肥料进行综合利用,经发酵得到一种含甲烷的混合气体。该气体中的甲烷(CH4)可用来还原氧化铜,反应的化学方程式为:
CH4+4CuO


① 上述 “

② 实验过程中可观察到,氧化铜变为 色;
③ 该反应中,铜元素的化合价是否发生改变 (填“是”或“否”);
④ 用足量的CO和CH4分别还原两份等质量的氧化铜,则两个反应生成铜的质量比为
⑴ 请将体现下列实验操作目的的正确选项,填在对应的横线上。
A.防止药品污染 B.防止试管破裂 C.防止实验误差 D.防止液体溅出
① 加热试管时,先均匀加热,后集中加热 ;
② 量取液体时,视线与凹液面最低处保持平视 ;
③ 过滤时,混合液沿玻璃棒慢慢倒入漏斗中 。
⑵ 用化学符号表示:
① 2个铁原子 ② 4个氢分子 ③ 2个碳酸根离子
④ 人体内含量最多的物质 ⑤ 硫酸铁中铁元素显+3价
⑶ 从下列灭火的原理中,选择合适的序号填空
A.隔绝氧气 B.隔绝可燃物 C.降低温度到着火点以下
①用灯帽盖灭酒精灯 ②吹灭蜡烛 ③用剪刀剪断燃着蜡烛的烛芯棉线灭燃
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【1】题量占比
单选题:(9道)
选择题:(10道)
填空题:(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:6
7星难题:0
8星难题:1
9星难题:4