1.计算题- (共1题)




| 反应前 | 反应后 |
烧杯及其中物质的质量 | ![]() | ![]() |
请你完成有关计算




2.科学探究题- (共1题)
(提出问题)过氧化钙可否用于制取氧气?
(查阅资料)部分内容如下:过氧化钙



实验装置 | 实验主要过程 |
![]() | ![]() ![]() ![]() ![]() ![]() |
实验结论:实验室中可加热过氧化钙制取氧气。

反应可制取氧气。
实验装置 | 实验主要过程 |
![]() | ![]() ![]() |
实验结论:实验室______


分析与反思:


你的合理建议是:______。
以上建议是否可行,还需进一步通过实验验证。
3.单选题- (共11题)

物 质 | X | Y | Z | Q |
反应前质量![]() | 0 | 160 | 20 | 50 |
反应后质量![]() | 222 | 0 | 2 | 6 |
则该密闭容器中发生的化学反应类型为


A.置换反应 | B.分解反应 | C.化合反应 | D.复分解反应 |
A. 果糖由碳、氢、氧三种元素组成
B. 果糖由果糖分子构成
C. 果糖中碳、氢、氧三种元素质量比为1:2:1
D. 1个果糖分子由6个碳原子、12个氢原子、6个氧原子构成
4.选择题- (共1题)
We all know that exercise is good for your health. But some kinds of exercise may be better than others. Running for example, may help to protect us {#blank#}1{#/blank#}heart disease and other health problems. Running also may help you live {#blank#}2{#/blank#}(long).
Recently, researchers studied more than 55,000 adults. About one-fourth of the adults reported running{#blank#}3{#/blank#}(regular). The study found these runners were considerably less likely than non-runners{#blank#}4{#/blank#}(die)of any form of disease, including heart disease.
D. C. Lee and the other researchers found that speed,{#blank#}5{#/blank#} (distant)and how often one runs made little difference in{#blank#}6{#/blank#}(reduce)the risk of death. The runners in the study averaged between 10 and 16 kilometers per hour. Mr. Lee says slower runners, and those who only ran once{#blank#}7{#/blank#}twice a week, were helped nearly as much as those who ran faster and further.
The researchers note that their study{#blank#}8{#/blank#}(base) on the participants' answering questions over the years. The study lacked complete information on {#blank#}9{#/blank#}these men and women ate and other facts about their lifestyles.
Researchers say this missing information could have affected the results. Still they hope their findings will motivate healthy adults to start running, a bit, down the road to live{#blank#}10{#/blank#}longer life.
5.填空题- (共4题)








6.实验题- (共1题)
-
【1】题量占比
计算题:(1道)
科学探究题:(1道)
单选题:(11道)
选择题:(1道)
填空题:(4道)
实验题:(1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:3
7星难题:0
8星难题:12
9星难题:3