1.选择题- (共3题)
阅读下面短文,从短文后所给的A、B、C三个选项中选出能填入相应空白处的最佳选项。
What is the best way to study? This is a very important question. Some Chinese students often 1 very hard for long hours. This is a 2 habit, but it is not a better way to study. An efficient (高效的) student must 3 enough sleep, enough food and enough rest. Every week you 4 to go out for a walk or visit some friends or some nice places. It's good for your study. When you 5back to your study, you'll find yourself 6 than before and you'll learn more.
Maybe we can 7that learning English is like taking Chinese medicine. We don't mean that it's 8. We mean that like Chinese medicine, the effect (效果) of your study 9 slowly but surely.
10 slowly but surely every day and effects will come just like Chinese medicine.
阅读下面短文,从短文后所给的A、B、C三个选项中选出能填入相应空白处的最佳选项。
What is the best way to study? This is a very important question. Some Chinese students often 1 very hard for long hours. This is a 2 habit, but it is not a better way to study. An efficient (高效的) student must 3 enough sleep, enough food and enough rest. Every week you 4 to go out for a walk or visit some friends or some nice places. It's good for your study. When you 5back to your study, you'll find yourself 6 than before and you'll learn more.
Maybe we can 7that learning English is like taking Chinese medicine. We don't mean that it's 8. We mean that like Chinese medicine, the effect (效果) of your study 9 slowly but surely.
10 slowly but surely every day and effects will come just like Chinese medicine.
2.单选题- (共1题)
编号 | Ⅰ | Ⅱ | Ⅲ |
实验 | ![]() | ![]() | ![]() |
现象 | 没有明显变化,溶液仍为无色 | 有白色沉淀生成,溶液为蓝色 | 有无色气体放出 |
以下结论正确的是( )
A.Ⅰ中无明显变化,说明两溶液不反应 |
B.Ⅱ中的白色沉淀为CuCl2 |
C.Ⅲ中的离子方程式为2H++Zn===Zn2++H2↑ |
D.Ⅲ中发生的反应不是离子反应 |
3.多选题- (共1题)
A.先将Na2CO3废液和Ca(OH)2废液混合,再与HCl废液混合 |
B.先将Na2CO3废液和HCl废液混合,再与Ca(OH)2废液混合 |
C.先将Ca(OH)2废液和HCl废液混合,再与Na2CO3废液混合 |
D.将Na2CO3废液和Ca(OH)2废液同时慢慢倒入HCl废液中 |
4.填空题- (共2题)
(1)溶解MgCl2固体所用的玻璃仪器有____________(填字母)。
A.天平 | B.烧杯 | C.漏斗 | D.玻璃棒 |
(3)AB段反应的离子方程式为______________________________。
(4)在B点对应的溶液中滴加AgNO3溶液,观察到的现象是_____________________,反应的离子方程式为______________________。
①将固体混合物溶于水中,搅拌后得无色透明溶液;
②往此溶液中滴加硝酸钡溶液,有白色沉淀产生;
③过滤,将沉淀物置于稀硝酸中,发现沉淀全部溶解。
根据上述实验事实,回答下列问题:
(1)原固体混合物中一定含有的物质是________,一定不含有的物质是________,可能含有的物质是________(以上空格均填写化学式)。对可能含有的物质,可采用向滤液中滴加___________________溶液的方法来检验。
(2)写出步骤③中的离子方程式__________________________________________________。
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【1】题量占比
选择题:(3道)
单选题:(1道)
多选题:(1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:4
7星难题:0
8星难题:0
9星难题:0