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【简答题】
(1)在25℃条件下将pH=11的氨水稀释100倍后溶液的pH为______________(填序号)。 A.9 B.13 C.11~13之间 D.9~11之间 (2)25℃时,向0.1mol/L的氨水中加入少量氯化铵固体,当固体溶解后,测得溶液pH减小,主要原因是(填序号)______________。 A.氨水与氯化铵发生化学反应 B.氯化铵溶液水解显酸性,增加了c(H + ) C.氯化铵溶于水,电离出大量铵离子,抑制了氨水的电离,使c(OH - )减小 (3)室温下,如果将0.1mol NH 4 Cl和0.05mol NaOH全部溶于水,形成混合溶液(假设无损失), ①_________和__________两种粒子的物质的量之和等于0.1mol。 ②_________和__________两种粒子的物质的量之和比OH - 多0.05mol。 (4)已知某溶液中只存在OH - 、H + 、NH 4 + 、Cl - 四种离子,某同学推测该溶液中各离子浓度大小顺序可能有如下四种关系 A.c(Cl - )>c(NH 4 + )>c(H + )>c(OH - ) B.c(Cl - )>c(NH 4 + )>c(OH - )>c(H + ) C.c(Cl - )>c(H + )>c(NH 4 + )>c(OH - ) D.c(NH 4 + )>c(Cl - )>c(OH - )>c(H + ) ① 若溶液中只溶解了一种溶质,该溶质的名称是____________,上述离子浓度大小顺序关系中正确的是 ______________(选填序号) 。 ② 若上述关系中C是正确的,则溶液中溶质的化学式是______________。 ③ 若该溶液中由体积相等的稀盐酸和氨水混合而成,且恰好呈中性,则混合前c(HCl)__________(填“>”、“3·H 2 O),混合后溶液中c(NH 4 + )与c(Cl - )的关系c(NH 4 + ) ___________ c(Cl - )。
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举一反三
【简答题】A.Group dates certainly lead to serious relationships for the members of the group. B.Maybe a girl and a boy on a group date find that they have a lot in common. C.Maybe a girl and a boy on a group da...
【单选题】使用GB/T 7714-2015标准,引用外文文献期刊中的析出文献需按顺序注明( )。
A.
作者/刊物名/文章名/卷期号/出版时间/页码
B.
作者/文章名/刊物名/卷期号/出版时间/页码
C.
作者/文章名/刊物名/出版时间/卷期号/页码
D.
作者/文章名/出版时间/刊物名/卷期号/页码
【单选题】What generally happens after a group makes a decision?
A.
Some group members regret their decision.
B.
At least one group member presents a new idea.
C.
As a whole, the group is even more united in its judgment.
D.
The popular group members compete for leadership.
【单选题】一种简单易行的健康教育方法,常在家庭访视及卫生所的诊治前后采用:
A.
个别会谈式教育
B.
示范法
C.
实地参观法
D.
角色扮演法
【单选题】Which of the following is a difference between leader behavior toward out-group members and in-group members?
A.
Leaders assign interesting assignments to out-group subordinates, whereas leaders assign primarily routine jobs to in-group subordinates and monitor their work closely.
B.
Leaders usually impose their views on out-group subordinates, whereas leaders sometimes defer to in-group subordinates' opinions.
C.
Leaders give specific directives for how to accomplish tasks and attain goals to in-group subordinates whereas leaders trust out-group subordinates to use their own approaches in solving problems.
D.
Leaders listen to suggestions and ideas given by in-group subordinates, whereas little interest is shown in comments and suggestions given by out-group subordinates.
【多选题】改扩建项目包括( )
A.
改建项目
B.
扩建项目
C.
技术改造
D.
迁建
【单选题】引用外文文献期刊中的析出文献按顺序需注明()。
A.
作者/刊物名/文章名/卷期号/出版时间/页码
B.
作者/文章名/刊物名/卷期号/出版时间/页码
C.
作者/文章名/刊物名/出版时间/卷期号/页码
【判断题】引用外文文献期刊中的析出文献按顺序需注明:作者/文章名/刊物名/出版时间/卷期号/页码。
A.
正确
B.
错误
【单选题】On the basis of figures it compiles, a citizens group argues that congressional members of Party X authorize the spending of more taxpayer dollars than do congressional members of Party Y. The groups ...
A.
The group weighs all votes for spending bills equally, no matter how much taxpayer money is involved in each bill.
B.
The group counts votes for all spending bills, including bills concerning the salaries of members of Congress.
C.
Most spending bills that are introduced in Congress are passed by Congress.
D.
Most spending bills that members of Party X vote for are written and sponsored by members of Party X.
E.
All spending bills, before being voted on by Congress, must be approved by committees in which members of both parties participate.
【多选题】下列关于改扩建项目财务分析的表述中,正确的有(    )。
A.
改扩建项目财务分析要注意计算期的确定
B.
改扩建项目财务分析可能涉及五套数据
C.
改扩建项目财务分析只进行增量分析
D.
改扩建项目财务分析应正确处理沉没成本
E.
改扩建项目财务分析应关注机会成本
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