1.选择题- (共14题)
1.Na2CO3俗称纯碱，是一种白色粉末，可以跟CO2和H2O反应生成NaHCO3，该 反应的化学方程式为{#blank#}1{#/blank#}；Na2CO3与稀盐酸反应放出CO2，但实验室却不用这个反应制备CO2，其主要原因可能是{#blank#}2{#/blank#}；已知Na2CO3的溶解度比NaHCO3大，那么在饱和的Na2CO3溶液中连续通人CO2，可观察到的现象是{#blank#}3{#/blank#}．
3.用“侯氏制碱法”制得的纯碱常含有少量的氯化钠．将10g含有氯化钠的纯碱溶解于102.32g稀盐酸中，恰好完全反应，收集到3.52g的气体（假设生成的气体全部逸出）．
求：反应后得到的不饱和溶液中溶质的质量分数．
4.除去难溶性杂质后的食盐中往往含有少量的Na2SO4、MgCl2、CaCl2等杂质，为了将这些杂质除去，可向食盐溶液中加入过量的NaOH、Na2CO3、BaCl2溶液，然后过滤除去沉淀，再加入盐酸调至溶液pH=7，最后蒸发得到精盐．下列操作及加入溶液顺序不正确的是（ ）
13.取两份等质量的xCuCO3•yCu（OH）2固体，在一份中加入过量盐酸，生成CO213.2g；加热另一份使其完全分解[已知CuCO3和Cu（OH）2最终全部转化为氧化铜]，得到CuO40.0g．则x和y的关系正确的是（ ）
14.取两份等质量的xCuCO3•yCu（OH）2固体，在一份中加入过量盐酸，生成CO213.2g；加热另一份使其完全分解[已知CuCO3和Cu（OH）2最终全部转化为氧化铜]，得到CuO40.0g．则x和y的关系正确的是（ ）
2.单项选择- (共20题)
15.
Will you please also state your earliest delivery date, your terms of payment, and discounts for regular _______?
| A．supplies | B．sales | C．purchases | D．accounts |
16.
—Can I have ________ apple?
—Oh, your sister has just had it.
—Oh, your sister has just had it.
| A．another | B．other | C．one more | D．the other |
17.
For _____ person with reading habits, _____ printed page contains not only words but ideas, thoughts and feelings.
| A．the; a | B．the; the | C．a; the | D．a; a |
18.
Some people have no idea that by helping a criminal they could ________with a prison sentence.
| A．come up | B．end up | C．put up | D．catch up |
19.
If you love someone, why ______ you chain him to your side, control his emotion, and even make him center on you?
| A．must | B．dare | C．need | D．will |
20.
Don’t to spring-clean the whole house just because my mother is coming — there’s no need to do that.
| A．undertake | B．attempt |
| C．bother | D．hesitate |
21.
They weighed the advantages of the operation ______ all the possible risks involved over and over again.
| A．within | B．except | C．behind | D．against |
22.
The young man has been trying everything in his power to please the director, ______ to get a role in the play.
| A．hoped | B．hoping | C．to hope | D．having hoped |
23.
Oh, boy, why are you just playing games all day? Can't you find something ______ doing at all?
| A．practical | B．valuab1e | C．worth | D．positive |
24.
Sometimes we just can’t understand why so many people fail to realize that wealth does not ______ bring happiness?
| A．consequently | B．automatically | C．necessarily | D．particularly |
25.
________the letters there are answers written by people who are supposed to know how to solve such problems.
| A．Along with | B．Apart from | C．According to | D．Regardless of |
26.
Joanna is no less hardworking than her twin sister, ________ she failed in the final exam.
| A．but | B．so | C．or | D．and |
27.
My husband________ a model plane the whole Sunday morning. I thought he would help do some washing.
| A．has made | B．made | C．was making | D．had made |
28.
_____ a piece of cheese cake my mum prepared---You won’t be disappointed!
| A．Trying | B．Tried | C．To try | D．Try |
29.
________there are a large number of chemical factories, the air is likely to be polluted.
| A．Where | B．That | C．Though | D．As |
30.
Research shows that though students benefit from having parents involved at school, _____ happens at home matters much more.
| A．which | B．what | C．that | D．whether |
31.
Children are excited about the approach of Christmas, _____ may bring great happiness to them.
| A．it | B．which | C．what | D．that |
32.
--So you know Catherine?
---Yes, it was last week_____ she came to visit my roommate Jane.
---Yes, it was last week_____ she came to visit my roommate Jane.
| A．that | B．when | C．since | D．before |
33.
—Hello. Is Mary there, please?
—I’m sorry, she is not here right now. _______?
—I’m sorry, she is not here right now. _______?
| A．What do you want her for | B．What do you want to say |
| C．Can I take a message | D．Can you tell me something |
试卷分析
-
【1】题量占比
选择题:(14道)
单项选择:(20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：19
7星难题：0
8星难题：1
9星难题：0