测定水泥中SO3含量的方法可分为（）和（）。

Jean Francis Grander was perhaps the most daring man who ever lived and perhaps the craziest．His greatest desire was to entertain and amaze people．He measured his success by the number of people who fainted dead away after witnessing his death-defying（极其惊险的）feats．

Grander，a blond Frenchman，toured North America in 1850，billing himself as “Blondin”．Blondin’s gift was excellent balance．This talent．coupled with a great desire to surprise and shock his audiences，made Blondin an incomparable performer．

His most famous feat was walking across Niagara Falls on a tightrope．Blondin’s “stage” consisted of a rope tied 1，100 feet across the falls．The rope hung some 160 feet above the rocks and boiling water below the falls．

Simply walking across the falls was not exciting enough for Blondin；he later had to ride across on a bicycle．Then，in another performance，he calmly walked across blindfolded（被蒙住的眼睛）．At still another time，he carried his terrified manager on his back and walked over the falls before thousands of breathless audience．

But Blondin was undoubtedly his own worst critic．He was never satisfied with hfs act and always tried to attract his audience with his balancing feat．One of his most daring walks was made in the darkness of night．Blondin became so famous on his tour through North America that his last performance was attended by an admiring Prince of Wales．

60．Why does the author think that Grander may be the craziest man in the world？

A．Because he enjoyed entertaining people by terrifying them．

B．Because many people died after seeing his feats．

C．Because his greatest desire was to entertain people．

D．Because he was an incomparable performer．

61．What does the underlined word “feat” in this passage mean？

A．excellent performance                                 B．tour

C．famous event                                              D．victory

6 2．What can we infer from the first sentence in the last paragraph？

A．Blondin was very content with his own performance．

B．Blondin was not very very good at criticism．

C．Blondin never thought that his performance was satisfy．

D．Blondin didn’t like criticism．

63．The author’S attitude towards“Blondin”is       ．

A．critical                   B．admiring                 C．negative                  D．depressed

64．Which of the following can NOT be drawn from the passage?

A．Blondin’s success had something to do with his character．

B．In order to be Successful，one should be a critic of himself．

C．Blondin conquered his audience simply by his talent．

D．People can get pleasure from a terrifying experience．

现使用酸碱中和滴定法测定市售白醋的总酸量（g/100mL）．

Ⅰ．实验步骤：

（1）用______（填仪器名称）量取10.00mL食用白醋，在______（填仪器名称）中用水稀释后转移到100mL______（填仪器名称）中定容，摇匀即得待测白醋溶液．

（2）用酸式滴定管取待测白醋溶液20.00mL于锥形瓶中，向其中滴加2滴______作指示剂．

（3）读取盛装0.1000mol/L NaOH 溶液的碱式滴定管的初始读数．如果液面位置如图所示，则此时的读数为______mL．

（4）滴定．当______时，停止滴定，并记录NaOH溶液的终读数．重复滴定3次．

Ⅱ．实验记录

滴定次数 实验数据（mL）	1	2	3	4
V（样品）	20.00	20.00	20.00	20.00
V（NaOH）（消耗）	15.95	15.00	15.05	14.95

Ⅲ．数据处理与讨论：

（1）甲同学在处理数据时计算得：

平均消耗的NaOH溶液的体积 V=

15.95+15.00+15.05+14.95

4

mL=15.24mL．

指出他的计算的不合理之处：______．

按正确数据处理，可得c（市售白醋）=______mol/L；市售白醋总酸量=______g/100mL．

（2）乙同学仔细研究了该品牌白醋的标签，发现其中还含有苯甲酸钠作为食品添加剂，他想用资料法验证醋酸与苯甲酸钠不会发生离子互换反应，需查找在一定温度下的醋酸与苯甲酸的______（填写序号）．

a．pH    b．电离度    c．电离常数    d．溶解度

（3）在本实验的滴定过程中，下列操作会使实验结果偏大的是______（填写序号）．

a．碱式滴定管在滴定时未用标准NaOH溶液润洗

b．碱式滴定管的尖嘴在滴定前有气泡，滴定后气泡消失

c．锥形瓶中加入待测白醋溶液后，再加少量水

d．锥形瓶在滴定时剧烈摇动，有少量液体溅出．

下列四组溶液，只提供无色酚酞试液不能鉴别的是[ ]

A.Na₂CO₃、Na₂SO₄、H₂SO₄、NaOH

B.NaOH、Ca(OH)₂、HCl、Na₂CO₃

C.HCl、H₂SO₄、Na₂CO₃、KNO₃

D.Na₂SO₄、Ba(OH)₂、H₂SO₄、HCl

数据的存储结构是指（）。

A．存储在外存中的数据

B．数据所占的存储空间量

C．数据在计算机中的顺序存储方式

D．数据的逻辑结构在计算机中的表示

“今天科学技术不仅仅是自然科学与工程技术，还是认识客观世界、改造客观世界的整个知识体系，而这个体系的最高概括是马克思主义哲学。”钱学森关于哲学与科学关系的论断的合理性在于（）

①认为哲学是科学之科学，是最高概括的科学

②主张科学是哲学的知识前提，哲学是科学的最高概括

③强调离开了哲学世界观的指导，科学研究就不能取得进展

④指出哲学与科学具有一致性，哲学对科学具有方法论的指导作用

A.①②

B.②③

C.②④

D.③④