1.计算题- (共4题)
| 酯的名称 | 甲酸甲酯 | 甲酸乙酯 | 乙酸甲酯 | 乙酸乙酯 |
| 化学式 | C2H4O2 | C3H6O2 | C3H6O2 | X |
(1)甲酸甲酯(C2H4O2)中碳元素、氢元素、氧元素的质量比为 _______；
(2)甲酸乙酯(C3H6O2)中碳元素的质量分数为_______(计算结果精确到0.1%)；
(3)比较归纳是学习化学的重要方法，据表推测X的化学式为________。
(1)葡萄糖的相对分子质量为_______;
(2)其中C、H、O三种元素的质量比为_____;
(3)葡萄糖中碳元素的质量分数为_____;
(4)18 g葡萄糖中所含氧元素的质量为_____g。
（1）紫杉醇的相对分子质量为____；
（2）紫杉醇中氮元素与氧元素的质量之比为___（写出最简整数比）；
（3）13.86g中紫杉醇中氢元素的质量为___g。
请根据提示中的信息回答下列问题：
（1）葡萄糖酸钙（C12H22O14Ca）的化学式量是_________；
（2）碳酸钙（化学式为CaCO3）中钙元素的质量分数为______；
（3）每片金钙尔奇中含碳酸钙的质量为________mg；
（4）按照金钙尔奇说明书每日的补钙量，若改服用葡萄糖酸钙片，一日3次，一次应服用几片？___________。
2.单选题- (共14题)
| A．异黄酮是由分子构成的 |
| B．异黄酮中碳、氢、氧三种元素的质量比为15：10：2 |
| C．异黄酮是由碳、氢、氧三种元素组成 |
| D．异黄酮的相对分子质量为222 |
| A．C18H34O2是氧化物 |
| B．C18H34O2是化合物 |
| C．C18H34O2的相对分子质量为282 |
| D．一个C18H34O2分子由54个原子构成 |
| A．+1 | B．+2 | C．+3 | D．+4 |
| A．由三种元素组成 |
| B．相对分子质量为422g |
| C．质量分数最大的是碳元素 |
| D．该分子中氢、氧原子个数比为18：11 |
A. 碳酸乙烯酯的相对分子质量为(12×3+1×4+16×3)g
B. 碳酸乙烯酯中C、H、O三种元素的质量比为12:1:16
C. 碳酸乙烯酯中C、H、O三种原子的个数比为3:4:3
D. 碳酸乙烯酯中碳元素的质量分数=
×100%| A．硫化丙烯的相对分子质量为74 |
| B．硫化丙烯中硫元素的质量分数最大 |
| C．硫化丙烯分子中碳、氢、硫元素质量比为3:6:1 |
| D．硫化丙烯由3个碳原子、6个氢原子和1个硫原子构成 |
| A．＋2 | B．＋4 | C．＋6 | D．－2 |
3.选择题- (共7题)
Wang Fei，a Chinese student，and Mary，an American student studying Chinese in China，were in a supermarket．They saw a young man walking down the stairs．In his hurry，he missed the last two steps and fell onto the ground．He tried to stand up while people around him laughed．Luckily，he seemed to be OK．
Mary found Wang Fei smiling a little and was not happy about it. “Tell me, Fei, how could people laugh when someone fell like that? Why didn't they go up and ask him if he was hurt?”
Wang Fei said, “Because they knew he wasn't hurt too much.”
“But I still don't understand．A fall is a fall．In my culture, people would never laugh!”
This is an example．The Chinese and the westerner will think and act differently when seeing such a thing．Chinese people are used to laughing or smiling．Very often the person who is in embarrassing（困窘的）situation would also laugh or smile to get out of it．However，if someone gets hurt seriously，it will not be a laughing matter any more．People will help him or her instead．
But，in that case，a westerner will rush over and help the person get up．If a westerner falls，he or she，like a Chinese person，may try to make a joke if he or she is not hurt．If two close friends are walking together，and one falls but clearly isn't hurt，a common joke is to say “Have a nice trip”．
So different people have different habits and different countries have different cultures
Wang Fei，a Chinese student，and Mary，an American student studying Chinese in China，were in a supermarket．They saw a young man walking down the stairs．In his hurry，he missed the last two steps and fell onto the ground．He tried to stand up while people around him laughed．Luckily，he seemed to be OK．
Mary found Wang Fei smiling a little and was not happy about it. “Tell me, Fei, how could people laugh when someone fell like that? Why didn't they go up and ask him if he was hurt?”
Wang Fei said, “Because they knew he wasn't hurt too much.”
“But I still don't understand．A fall is a fall．In my culture, people would never laugh!”
This is an example．The Chinese and the westerner will think and act differently when seeing such a thing．Chinese people are used to laughing or smiling．Very often the person who is in embarrassing（困窘的）situation would also laugh or smile to get out of it．However，if someone gets hurt seriously，it will not be a laughing matter any more．People will help him or her instead．
But，in that case，a westerner will rush over and help the person get up．If a westerner falls，he or she，like a Chinese person，may try to make a joke if he or she is not hurt．If two close friends are walking together，and one falls but clearly isn't hurt，a common joke is to say “Have a nice trip”．
So different people have different habits and different countries have different cultures
C
There are an extremely large number of ants worldwide. Each individual ant hardly weigh anything, but together they weigh almost the same as all of mankind. They also live nearly everywhere, except on frozen mountain tops or around the Antarctic. For animals their size, ants have been surprisingly successful, largely due to their wonderful social conduct.
In groups that vary in size from a few hundred to tens of millions, they organize their lives with a clear distribution of labor. Even more amazing is how they achieve this level of organization. While we use sound and sight to communicate, ants depend mostly on pheromone (信息素), which is a kind of chemical released by individuals and smelled or tasted by fellow members of a group. When an ant finds food, it produces a pheromone that will lead others straight to where the food is. When an ant comes under attack or is dying, it sends out an alarm pheromone to warn the whole group to prepare for a defensive fight.
In fact, when it comes to the art of war, ants have no equal. They are completely fearless and will take on an animal much larger than themselves, attacking in large groups and beating their target. They show so much devotion to their group that not only soldier ants but also worker ants will sacrifice their lives to help defeat an enemy.
United and devoted, these little animals have survived on the earth for more than 140 million years, far longer than dinosaurs. Because they think as one, they have a united intelligence greater than you would expect from one small individual ant.
C
There are an extremely large number of ants worldwide. Each individual ant hardly weigh anything, but together they weigh almost the same as all of mankind. They also live nearly everywhere, except on frozen mountain tops or around the Antarctic. For animals their size, ants have been surprisingly successful, largely due to their wonderful social conduct.
In groups that vary in size from a few hundred to tens of millions, they organize their lives with a clear distribution of labor. Even more amazing is how they achieve this level of organization. While we use sound and sight to communicate, ants depend mostly on pheromone (信息素), which is a kind of chemical released by individuals and smelled or tasted by fellow members of a group. When an ant finds food, it produces a pheromone that will lead others straight to where the food is. When an ant comes under attack or is dying, it sends out an alarm pheromone to warn the whole group to prepare for a defensive fight.
In fact, when it comes to the art of war, ants have no equal. They are completely fearless and will take on an animal much larger than themselves, attacking in large groups and beating their target. They show so much devotion to their group that not only soldier ants but also worker ants will sacrifice their lives to help defeat an enemy.
United and devoted, these little animals have survived on the earth for more than 140 million years, far longer than dinosaurs. Because they think as one, they have a united intelligence greater than you would expect from one small individual ant.
托尼, 这里冬天天气怎么样?
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托尼, 这里冬天天气怎么样?
Tony, {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} {#blank#}4{#/blank#}in winter here?
4.填空题- (共7题)
(1)图1是人体中元素质量分数模型，则A代表的元素是____(填名称)。
(2)小明模仿图1构建了NH4NO3中各元素质量分数的模型(如图2所示)，则图2中表示氮元素的是___。
(1)原子序数为3的元素属于_______(填“金属”或“非金属”)元素，位于第3周期第ⅥA族的元素是___(填元素符号)。
(2)氮元素和磷元素的化学性质相似，是因为氮原子和磷原子的_______相同。
(3)在化学反应中，原子序数为17的元素的原子容易___(填“得到”或“失去”)电子。
(4)由原子序数为1、8、12的元素组成的物质的化学式是___。
（1）“Co”表示_______元素（填名称）；
（2）“CO”是由______两种元素（填名称）组成的_____（填“单质”或“化合物”）．
(1)银____;
(2)4个二氧化硫分子______;
(3)2个铝离子_____;
(4)高锰酸钾______;
(5)+3价的铝元素____;
(6)由Ca2+和H2P
构成的磷酸二氢钙____。-
【1】题量占比
计算题:(4道)
单选题:(14道)
选择题:(7道)
填空题:(7道)
-
【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：11
7星难题：0
8星难题：12
9星难题：2