1.选择题- (共8题)
1.下列说法错误的是( )
①NaHCO3溶液加水稀释,c(Na+)/c(HCO3﹣)的比值保持增大
②浓度均为0.1mol•L﹣1的Na2CO3、NaHCO3混合溶液:2c(Na+)=3[c(CO32﹣)+c(HCO3﹣)]
③在0.1mol•L﹣1氨水中滴加0.1mol•L﹣1盐酸,恰好完全反应时溶液的pH=a,则由水电离产生的c(OH﹣)=10﹣amol•L﹣﹣1
④向0.1mol/LNa2SO3溶液中加入少量NaOH固体,c(Na+)、c(SO32﹣)均增大
⑤浓度相等的①NH4HSO4溶液、②NH4HCO3溶液、③NH4Cl溶液中的c(NH4+):①>②>③
⑥NaHSO3溶液显酸性,c(Na+)>c(HSO3﹣)>c(H+)>c(OH﹣)>c(SO32﹣)
⑦常温下,CH3COONa和CH3COOH混合溶液[pH=7,c(Na+)=0.1mol•L﹣1]:c(Na+)=c(CH3COO﹣)>c(CH3COOH)>c(H+)=c(OH﹣)
⑧pH=3.6的0.1mol/L HX与0.1mol/L NaX的混合溶液中,c(H+)﹣c(OH﹣)=c(X﹣)﹣c(HX)
2.单项选择- (共10题)
9.
——where did President Xi Jinping have steamed dumplings?
_____It was at the Qing Feng Steamed Dumpling Shop _____ he lined up with other customers.
_____It was at the Qing Feng Steamed Dumpling Shop _____ he lined up with other customers.
A.That | B.in which | C.where | D.when |
10.
Nowadays, _____ growing number of Chinese students are going abroad to seek______ better future.
A.The, a | B.a, the | C.a, a | D.the, the |
11.
If the government takes measures to enrich senior citizens’ social and spiritual life, it ____ help develop a truly harmonious society.
A.Can | B.must | C.shall | D.should |
12.
Since her only child passed away a few years ago, family has been a ________ topic for her.
A.forbid | B.forbade | C.forbidding | D.forbidden |
13.
A Nepal plane crashed in bad weather, ________ all 18 on board.
A.killing | B.killed | C.having killed | D.to kill |
14.
The research also raises the question ________ children from low-income, less educated families need earlier aid.
A.what | B.that | C.when | D.whether |
15.
Most volunteers are from universities, _________ it is not uncommon to see middle and primary school students too.
A.though | B.however | C.since | D.even if |
16.
Outdoor activities are as much a part of childhood for this generation of Chinese children as they __________ for their parents and grandparents.
A.are | B.will be | C.were | D.have been |
17.
An important feature of consumer society is that we gain self-confidence through ______ we own.
A.that | B.what | C.which | D./ |
试卷分析
-
【1】题量占比
选择题:(8道)
单项选择:(10道)
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【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:10
7星难题:0
8星难题:0
9星难题:0