1.选择题- (共9题)
1.在标准大气压下，使用燃气灶烧水时，把质量为4kg、初温为20℃的水加热到100℃，燃烧了0.04m3天然气（假设天然气完全燃烧）．已知水的比热容为4.2×103J/（kg•℃），天然气的热值为8.4×107J/m3．则水吸收的热量为{#blank#}1{#/blank#} J，燃气灶烧水时的效率为{#blank#}2{#/blank#}
2.在标准大气压下，使用燃气灶烧水时，把质量为4kg、初温为20℃的水加热到100℃，燃烧了0.04m3天然气（假设天然气完全燃烧）．已知水的比热容为4.2×103J/（kg•℃），天然气的热值为8.4×107J/m3．则水吸收的热量为{#blank#}1{#/blank#} J，燃气灶烧水时的效率为{#blank#}2{#/blank#}
3.某型号天然气泄漏检测仪器的电路如图甲所示，图中R为气敏电阻，其阻值R与天然气浓度β的变化关系如图乙所示，已知R0为定值电阻，电源电压恒定不变，用此仪器检测天然气是否泄漏，则下列判断正确的是（ ）
4.某型号天然气泄漏检测仪器的电路如图甲所示，图中R为气敏电阻，其阻值R与天然气浓度β的变化关系如图乙所示，已知R0为定值电阻，电源电压恒定不变，用此仪器检测天然气是否泄漏，则下列判断正确的是（ ）
8.标有“2V 1W”字样的小灯泡和标有“20Ω 1A”字样的滑动变阻器连接在如图所示的电路中，其中电源电压为6V，电流表的量程为“0～0.6A”，电压表的量程为“0～3V”，设小灯泡电阻不变．闭合开关，移动滑动变阻器的滑片，电流表、电压表示数的范围是（ ）
9.校园内刚铺上塑胶跑道，同学们会闻到一股强烈的塑胶气味，这是因为塑胶分子{#blank#}1{#/blank#}；体育课上，小丽和同学同时同向沿内圈跑道边线以1.5m/s的速度，平均60cm的步幅匀速走了两圈，以{#blank#}2{#/blank#}为参照物，小丽是静止的．
2.单项选择- (共11题)
10.
A working party(工作组) has been set up to ________ the problem.
| A．look through | B．look up | C．look into | D．look out |
11.
I don't of your sending your daughter to Britain to study，because she is
too young.
too young.
| A．agree | B．approve | C．support | D．assess |
12.
In copying this paper, be careful not to _______ any word.
| A．leave behind | B．leave aside | C．leave off | D．leave out |
13.
Our class _______ of thirty-two boys and twenty-three girls.
| A．composes | B．concludes | C．contains | D．Consists |
15.
She felt herself _______ by her friends.
| A．misunderstand | B．misunderstanding | C．misunderstood | D．to misunderstand |
17.
—How did you go home after the party last night？
—Well，there were no buses we had to walk.
—Well，there were no buses we had to walk.
| A．so as to | B．in order to | C．so that | D．in order that |
18.
Have you ever met with this case in your life you can't understand others
even if they have said something several times？
even if they have said something several times？
| A．where | B．what | C．that | D．which |
19.
Only in this way _________ learn this language well.
| A．you will | B．you can | C．can you | D．have you |
试卷分析
-
【1】题量占比
选择题:(9道)
单项选择:(11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：2
5星难题：0
6星难题：6
7星难题：0
8星难题：1
9星难题：1