1.选择题- (共1题)
1.几位同学在探索pH对α-淀粉酶活性的影响时，设计的实验方案如下。其中操作及顺序最合理的是 （ ）
①在三个试管中各加入可溶性淀粉溶液2 mL
②在三个试管中各加入新鲜的α-淀粉酶溶液1mL
③置于适宜温度下保温5min
④分别置于100℃、60℃、0℃环境中保温5min
⑤加入斐林试剂后，水浴加热，观察现象
⑥将试管中溶液的pH分别调到3、7、11，保持5min
①在三个试管中各加入可溶性淀粉溶液2 mL
②在三个试管中各加入新鲜的α-淀粉酶溶液1mL
③置于适宜温度下保温5min
④分别置于100℃、60℃、0℃环境中保温5min
⑤加入斐林试剂后，水浴加热，观察现象
⑥将试管中溶液的pH分别调到3、7、11，保持5min
2.单项选择- (共15题)
2.
As an extraordinary year comes to an end, the TIME magazine is inviting readers to help the person who has most influenced the world.
| A．defend | B．respect |
| C．inform | D．select |
3.
As a(n) _______ student, his duty includes taking responsibility for his personal behavior.
| A．regular | B．usual |
| C．normal | D．average |
4.
She spoke_______ her son, saying that he was still a child who sometimes would do wrong things.
| A．in memory of | B．in defense of |
| C．in search of | D．in need of |
5.
What is worth doing deserves_______ with great efforts.
| A．to be doing | B．to do |
| C．to be done | D．done |
6.
People come into your life for a reason, a season or a lifetime. When you_______ which one it is, you will know what to do for each person.
| A．give out | B．leave out |
| C．turn out | D．figure out |
7.
When People’s Bank of China announced that we should stop the use of bitcoin(比特币),there was fear among those who had had their Chinese Yuan_______ for bitcoin.
| A．misunderstood | B．desired |
| C．mistaken | D．traded |
8.
If you would like to make a_______ to our charity, please contact us either by phone or e-mail.
| A．devotion | B．donation |
| C．selection | D．graduation |
9.
---Is your Uncle Tom a soldier?
---No, but he once _______ in the army for 4 years.
---No, but he once _______ in the army for 4 years.
| A．served | B．is serving |
| C．has served | D．was serving |
10.
The house which I grew up in has been taken down and replaced by an office building _______ wall is yellow.
A. of which B. where
C. whose D. on which
A. of which B. where
C. whose D. on which
11.
The treatment will continue until the patient reaches the point_______ he can walk.
A. that B. why
C. which D. where
A. that B. why
C. which D. where
12.
The teacher along with the students_______ discussing the Reading Skills that was newly published in America in the classroom now.
| A．are | B．were |
| C．is | D．was |
13.
Healthy eating along with exercise is probably the only way_____ can help you become fit.
A. which B. that
C. in which D. by which
A. which B. that
C. in which D. by which
14.
---He is unlike his father who drinks a lot, _______?
---Yes. He never drinks.
---Yes. He never drinks.
| A．is he | B．doesn’t he |
| C．does he | D．isn’t he |
15.
---Honey, I have to say I can’t go to the party tonight. I’m tired out.
----_______. Have some fun!
----_______. Have some fun!
| A．Don’t pull my leg. | B．Don’t be a wet blanket. |
| C．Don’t be a black sheep. | D．Don’t give me the cold shoulder. |
试卷分析
-
【1】题量占比
选择题:(1道)
单项选择:(15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：1
5星难题：0
6星难题：13
7星难题：0
8星难题：0
9星难题：1