1.选择题- (共8题)
1.一包白色粉末,其中可能含有NaCl、Ba(NO3)2、CuSO4、Na2CO3,现做以下实验:
①将部分粉末加入水中,振荡,有白色沉淀生成,过滤,滤液呈无色
②向①中的沉淀物中加入足量稀硝酸,固体完全溶解,并有气泡产生
③取少量②的溶液,滴入稀硫酸,有白色沉淀产生
试根据上述实验现象判断,原白色粉末中
一定含有的物质是{#blank#}1{#/blank#},
一定不含的物质是{#blank#}2{#/blank#},
可能含有的物质是{#blank#}3{#/blank#}(以上物质均写化学式),
写出第①步中反应的化学方程式:{#blank#}4{#/blank#},
第②反应步中离子方程式:{#blank#}5{#/blank#}.
3.用某种大小相似的绿色植物轮藻叶片分组进行光合作用试验,已知试验前叶片质量相等,在不同的温度下分别暗处理1小时,测其质量变化,立即光照1小时(光照强度相同),在测其质量变化,得到如下结果:
据表分析,以下说法正确的是( )
组 别 | 一 | 二 | 三 | 四 |
温 度(℃) | 26 | 27 | 28 | 29 |
暗处理后的质量变化(㎎) | —2 | —3 | —4 | —4.5 |
光照后与暗处理前的质量变化(㎎) | +4 | +3 | +3 | +1 |
7.某气体可能含有CO、CO2、NH3、HCl、H2和水蒸气中的一种或几种,依次通过澄清石灰水(无浑浊现象)、氢氧化钡溶液(有浑浊现象)、浓硫酸、灼热的氧化铜(变红)和无水CuSO4(变蓝),判断该气体中一定有( )
8.某气体可能含有CO、CO2、NH3、HCl、H2和水蒸气中的一种或几种,依次通过澄清石灰水(无浑浊现象)、氢氧化钡溶液(有浑浊现象)、浓硫酸、灼热的氧化铜(变红)和无水CuSO4(变蓝),判断该气体中一定有( )
2.单项选择- (共8题)
9.
--- Smoking is bad for your health. ---Yes, I know. But I simply can’t ___.
A.give it up | B.give it in | C.give it out | D.give it away |
10.
I ______ her to work hard at English, but she didn’t listen to me.
A.advised | B.tried to persuade |
C.hoped | D.suggested |
11.
Neither of them knows the difference ______ the two and we can’t tell one ______ the other, either.
A.between; between | B.among; from | C.among; between | D.between; from |
12.
A friend of ______ went to the railway station to see ______.
A.Rebecca;her off | B.Rebecca; off her |
C.Rebecca’s; her off | D.Rebecca’s; off her |
13.
---How long has your brother been working here?
---_______ he graduated from college in 2007.
---_______ he graduated from college in 2007.
A.When | B.Until | C.Long before | D.Ever since |
14.
It was only when I reread his poems recently______ I began to appreciate their beauty.
A.until | B.that . |
C.then | D.so |
15.
Tom insisted what he said ______ true, but we insisted that he _____ and have a look.
A.be, should go | B.should be, would go | C.was, go | D.was, would go |
试卷分析
-
【1】题量占比
选择题:(8道)
单项选择:(8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:2
9星难题:0