1.选择题- (共4题)
1.下表中除杂方法正确的是（ ）
选项 | 物质 | 所含杂质 | 除杂质的方法 |
A | 二氧化碳 | 一氧化碳 | 将混合气体点燃 |
B | 硝酸钾 | 氯化钠 | 冷却热饱和溶液，过滤 |
C | 铁粉 | 铜屑 | 加入过量稀盐酸，过滤 |
D | 氯化钾 | 二氧化锰 | 加水溶解，过滤，洗涤干燥 |
2.下表中除杂方法正确的是（ ）
选项 | 物质 | 所含杂质 | 除杂质的方法 |
A | 二氧化碳 | 一氧化碳 | 将混合气体点燃 |
B | 硝酸钾 | 氯化钠 | 冷却热饱和溶液，过滤 |
C | 铁粉 | 铜屑 | 加入过量稀盐酸，过滤 |
D | 氯化钾 | 二氧化锰 | 加水溶解，过滤，洗涤干燥 |
3.下表中除杂方法正确的是（ ）
选项 | 物质 | 所含杂质 | 除杂质的方法 |
A | 二氧化碳 | 一氧化碳 | 将混合气体点燃 |
B | 硝酸钾 | 氯化钠 | 冷却热饱和溶液，过滤 |
C | 铁粉 | 铜屑 | 加入过量稀盐酸，过滤 |
D | 氯化钾 | 二氧化锰 | 加水溶解，过滤，洗涤干燥 |
2.单项选择- (共7题)
5.
Bob would have helped us yesterday, but he ____________.
| A．is busy | B．had been busy | C．has been busy | D．was busy |
6.
The international agreement, __________to help people kick off the habit of smoking, was signed two years ago.
| A．intended | B．intending | C．intends | D．to intend |
7.
__________ everything a shot because you never know what is going to change your life.
| A．Giving | B．To give | C．Give | D．Given |
8.
He is writing a novel, so he shuts himself up, ________ to receive guests.
| A．refuses | B．to refuse | C．refusing | D．refused |
9.
The Hengxin Square is located in ____________ used to be our canteen.
| A．what | B．where | C．which | D．the place |
10.
Because of the Mid-autumn Day happening to come along, we have just enjoyed a longer National Day vacation than ever before, but it is estimated that it will be 38 years ___________ we can experience such a coincidence again.
| A．that | B．before | C．since | D．when |
试卷分析
-
【1】题量占比
选择题:(4道)
单项选择:(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：6
7星难题：0
8星难题：1
9星难题：0