1.选择题- (共11题)
3.将4 mol A气体和2 mol B气体在2 L的容器中混合并在一定条件下发生如下反应2A(g)+B(g)
2C(g),若2 s(秒)后测得C的浓度为0.6 mol/L,现有下列几种说法:
①用物质A表示反应的平均速率为0.3 mol/(L·s)
②用物质B表示反应的平均速率为0.6 mol/(L·s)
③2s时物质A的转化率为60% ④2 s时物质B的浓度为0.7 mol/L
其中正确的是( )

①用物质A表示反应的平均速率为0.3 mol/(L·s)
②用物质B表示反应的平均速率为0.6 mol/(L·s)
③2s时物质A的转化率为60% ④2 s时物质B的浓度为0.7 mol/L
其中正确的是( )
2.单项选择- (共14题)
12.
Biology is _____.
Biology is _____.
A.science of life | B.science of the life | C.the science of the life | D.the science of life |
14.
It _____ to the airport.
It _____ to the airport.
A.takes forty minute's drive to get | B.takes forty-minute drive to get |
C.is forty-minutes' drive | D.is a forty-minute drive |
18.
The man ______ is our new headmaster.
The man ______ is our new headmaster.
A.who the teacher is talking to him | B.whom the teacher is talking |
C.the teacher is talking to | D.who the teacher is talking |
20.
Included _____.
Included _____.
A.all kinds of books | B.was all kinds of books |
C.were all kinds of books | D.all kinds of books are |
21.
Next door to ours _____, who has just retired from work.
Next door to ours _____, who has just retired from work.
A.where lives an old man | B.where does an old man live |
C.lives an old man | D.does an old man live |
22.
Scarcely _____ raining _____ the PLA fighters started on their way again.
Scarcely _____ raining _____ the PLA fighters started on their way again.
A.it had stopped...before | B.it had stopped...then |
C.had it stopped...than | D.had it stopped...when |
23.
So _____ that modern industry cannot develop without it.
So _____ that modern industry cannot develop without it.
A.electricity is important | B.important is electricity |
C.electricity important is | D.important electricity is |
试卷分析
-
【1】题量占比
选择题:(11道)
单项选择:(14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:0
7星难题:0
8星难题:14
9星难题:0