1.选择题- (共11题)
1.亮亮设计了一个用电压表示数变化反映环境温度变化的电路,其电路原理图如图(a)所示,其中,电源两端电压U=4V(恒定不变).电压表量程为0~3V,R0是定值电阻,R0=300Ω,R1是热敏电阻,其电阻随环境温度变化的关系如图(b)所示.闭合开关S后.求:
①当环境温度为40℃时,热敏电阻R1的阻值是多少?
②当环境温度为40℃时,电压表的示数是多少?
③电压表两端电压不能超过其最大测量值,则此电路所允许的最高环境温度是多少?
2.亮亮设计了一个用电压表示数变化反映环境温度变化的电路,其电路原理图如图(a)所示,其中,电源两端电压U=4V(恒定不变).电压表量程为0~3V,R0是定值电阻,R0=300Ω,R1是热敏电阻,其电阻随环境温度变化的关系如图(b)所示.闭合开关S后.求:
①当环境温度为40℃时,热敏电阻R1的阻值是多少?
②当环境温度为40℃时,电压表的示数是多少?
③电压表两端电压不能超过其最大测量值,则此电路所允许的最高环境温度是多少?
3.
为了探究液体温度升高时吸收热量的多少与哪些因素有关,某同学做了如下实验:在四个相同的烧杯中分别盛有水和煤油,用同样的加热器加热.下表是他们的实验记录,根据实验记录回答下列问题:
烧杯号 | 液体 | 质量/g | 初温/℃ | 末温/℃ | 加热时间/min |
1 | 水 | 300 | 20 | 30 | 12 |
2 | 水 | 150 | 20 | 30 | 6 |
3 | 煤油 | 300 | 20 | 30 | 6 |
4 | 煤油 | 300 | 20 | 25 | 3 |
4.
为了探究液体温度升高时吸收热量的多少与哪些因素有关,某同学做了如下实验:在四个相同的烧杯中分别盛有水和煤油,用同样的加热器加热.下表是他们的实验记录,根据实验记录回答下列问题:
烧杯号 | 液体 | 质量/g | 初温/℃ | 末温/℃ | 加热时间/min |
1 | 水 | 300 | 20 | 30 | 12 |
2 | 水 | 150 | 20 | 30 | 6 |
3 | 煤油 | 300 | 20 | 30 | 6 |
4 | 煤油 | 300 | 20 | 25 | 3 |
8.如图所示电路中,要使电灯L1和L2接成串联电路,应闭合开关{#blank#}1{#/blank#};若要使电灯L1和L2接成并联电路,应闭合开关{#blank#}2{#/blank#}
9.如图所示电路中,要使电灯L1和L2接成串联电路,应闭合开关{#blank#}1{#/blank#};若要使电灯L1和L2接成并联电路,应闭合开关{#blank#}2{#/blank#}
10.如图所示是一个便携式充电器正在给手机锂电池充电,在充电过程中,该手机电池相当于电路中的{#blank#}1{#/blank#}(选填“电源”、“开关”、“导线”或“用电器”),充电时,电能转化为{#blank#}2{#/blank#}.
2.单项选择- (共13题)
12.
The key to our success was having the courage to take on any job, and then being creative in our _______ to getting it finished.
A.measure | B.approach | C.methods | D.chance |
13.
He carelessly dropped the ________ and broke it up.
A.glass of beer | B.beer glass | C.glass for beer | D.beer’s glass |
14.
---Can you tell me why more and more people choose to shop in a supermarkets?
---Because it offers a great ______ of goods.
---Because it offers a great ______ of goods.
A.connection | B.mixture | C.variety | D.majority |
15.
______ is often the case is that Tom doesn’t study hard and fails in passing an exam.
A.That | B.As | C.It | D.What |
16.
It is a general rule that children’s games and books seek to teach and ______ at the same time.
A.satisfy | B.appreciate | C.entertain | D.content |
17.
The quiet girl has ________ since she became a sales clerk.
A.come to light | B.come to herself | C.come to an end | D.come to life |
18.
It was foolish of him to ________ his notes while taking such an easy test, and as a result, he got punished.
A.refer to | B.speak of | C.cheat in | D.take out |
19.
---Allen said something hard to understand at the conference.
---Yes, her remarks left me _______ about her real purpose.
---Yes, her remarks left me _______ about her real purpose.
A.wondering | B.to wonder | C.having wondered | D.wondered |
20.
Without Ms Smith ________ your way, I bet you won’t find their secret living place.
A.leading | B.will lead | C.to lead | D.to be leading |
21.
Many people think that it is ______ making such an experiment.
A.valuable | B.worthwhile | C.convenient | D.important |
22.
We should admit the fact that some families still can not afford their children going to school education, university ________.
A.in particular | B.in expectation | C.in charge | D.in certainty |
23.
______ the new policy, we are now living in a grand, new apartment.
A.In that | B.Due to | C.Thanks to | D.In hope of |
试卷分析
-
【1】题量占比
选择题:(11道)
单项选择:(13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:4
5星难题:0
6星难题:9
7星难题:0
8星难题:0
9星难题:0