可作为融资买入和融券卖出的标的证券，一般是在证券交易所上市交易并经证券交易所认可的（

常温下，向0．25mol/L的硫酸溶液中逐滴加入物质的量浓度相同的氢氧化钡溶液，生成沉淀与加入氢氧化钡溶液的体积关系如图所示，a、b、c、d分别表示实验不同时刻的溶液。

（1）硫酸溶液的体积为___________________ ；

（2）b时刻溶液中SO₄^2-的浓度约为___________________mol/L；

（3）d时刻溶液中的pH约为____________________________；

（4）各时刻溶液的导电能力由大到小的顺序是_____________________________。

短文改错（共10小题；每小题1分，满分10分）

It is bad manners in the classroom to look for what our          66. __________

neighbor had written, or try to see what mark he has received        67. __________

without being permitted. It is good manners for them to help        68. __________

each other if we have the same desire and the teacher allows to it.     69. __________

In examinations and in certain kinds of written work, it is dishonest    70. __________

and foolishly to help or to ask help from others. When one student     71. __________

does so, much larger values are destroying. One may not agree        72. __________

to examination system, but at present it is basically the only          73. __________

measure that the teacher and the rest of the world can depend to       74. __________

decide if or not each of us meets the requirement.                   75. __________

)

乌梅丸的主治病证是（）

A.痰厥

B.蛔厥

C.气厥

D.血厥

E.晕厥

在会声会影中，是（）。

A.修整托柄栏

B.飞梭栏

C.前进一帧

D.后退一帧