1.计算题- (共1题)
| | 第一次 | 第二次 | 第三次 |
| 加入稀盐酸的体积（mL） | 5 | 5 | 5 |
| 生成氢气的质量（g） | 0.04 | m | 0.02 |
（1）m=______。
（2）此黄铜样品中锌的质量分数是多少______？
2.单选题- (共8题)
A. Cl2+2NaBr═2NaCl+Br2
B. 2Mg+CO2
2MgO+CC. 2Na+2H2O═2NaOH+H2↑
D. 2Na2O2+2H2O═4NaOH+O2↑
| A．细铁丝在空气中不能燃烧，是因为温度没有达到它的着火点 |
| B．镁在空气中能与氧气发生化学反应，其化学方程式为Mg+O2=MgO2 |
| C．根据各种金属与氧气反应的难易程度，可以初步比较一些金属的化学活泼性 |
| D．金属与氧气发生化学反应时，都需要在点燃或加热的条件下才能发生 |
| A．t1时，产生气体的质量：X＞Y |
| B．t2时，消耗金属的质量：X＞Y |
| C．t3时，消耗金属的质量：X＝Y |
| D．t3时，消耗盐酸的质量：X＝Y |
3.选择题- (共4题)
The Chinese people are willing to get on with other countries {#blank#}1{#/blank#} (peace).
him sleep quick hurt smell |
①Do you know why Jenny ran {#blank#}1{#/blank#} out of the room?
②The baby is too young to look after{#blank#}2{#/blank#}.
③I got up too early and I'm feeling very {#blank#}3{#/blank#} now.
④My brother {#blank#}4{#/blank#} his leg when he fell off the bike.
⑤This flower sends out one kind sweet {#blank#}5{#/blank#}.
him sleep quick hurt smell |
①Do you know why Jenny ran {#blank#}1{#/blank#} out of the room?
②The baby is too young to look after{#blank#}2{#/blank#}.
③I got up too early and I'm feeling very {#blank#}3{#/blank#} now.
④My brother {#blank#}4{#/blank#} his leg when he fell off the bike.
⑤This flower sends out one kind sweet {#blank#}5{#/blank#}.
him sleep quick hurt smell |
①Do you know why Jenny ran {#blank#}1{#/blank#} out of the room?
②The baby is too young to look after{#blank#}2{#/blank#}.
③I got up too early and I'm feeling very {#blank#}3{#/blank#} now.
④My brother {#blank#}4{#/blank#} his leg when he fell off the bike.
⑤This flower sends out one kind sweet {#blank#}5{#/blank#}.
4.填空题- (共1题)
-
【1】题量占比
计算题:(1道)
单选题:(8道)
选择题:(4道)
填空题:(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：3
5星难题：0
6星难题：6
7星难题：0
8星难题：1
9星难题：0