因为a×25=b，根据除法的意义，把它改写成两个除法算式是：______÷___

关于成本领先战略的说法，错误的是（）。

A.成本领先战略假设产品价格的大幅度变化对顾客的需求影响不大

B.围绕短期的、结构导向的绩效评价来制订人力资源战略

C.采用内部晋升，建立内部一致性的报酬系统，拉大上下级之间的工资差距

D.通过员工参与以及吸取员工们所提出的关于如何才能提高生产效率的意见来达到更高水平的效率

配制250mL0.10mol/L的盐酸溶液时，下列实验操作会使配得的溶液浓度偏小的是 [ ]

A．容量瓶洗涤后内壁有水珠而未作干燥处理

B．在容量瓶中进行定容时俯视刻度

C．用量筒量取所用盐酸溶液时俯视刻度

D．量取盐酸后倒入烧杯，再用水洗涤量筒2~3次，并把洗涤液倒入烧杯中

阅读理解。

     You've attended all the classes,done all of your homework and you think you have grasped

the material.But then the day of the test comes.Suddenly,you feel so nervous that you can't answer

those questions you knew the answers to just last night.If this sounds like you,you may have a

case of test anxiety (焦虑)．

     Test anxiety can be a real problem.When someone is stressed out over a test,he or she

may not be able to do his or her best work.Feeling ready to meet the challenge,though,can keep

test anxiety at a proper level.

     Use a little stress to your advantage.Stress is your body's warning mechanism (装置)-it's

a signal that helps you prepare for something important that's about to happen.Instead of worrying

too much about the test,take  an active way.Let stress remind you to study well before a test.Then

you'll stop your stress from being out of control.

     Ask for help.Although a little test anxiety can be a good  thing,too much of it is another story

entirely.If sitting for  a test makes your mind go blank and causes you to miss answers that you know,

then your level of test anxiety  probably needs some attention.Your teacher,your parents,or a tutor

can be a useful resource to talk to if you always get too much test anxiety.

     Be prepared.Many students find that their  test anxiety is  reduced when they start to study better.

It works-the better you know the material,the more confidence you'll have.

1.What is this passage mainly about?

A．What should be done before a test.

B．How to deal with test anxiety.

C．What causes test anxiety.

D．What test anxiety is.

2．The underlined word "grasped" in Paragraph 1 probably means________.

A．received    

B．passed

C．understood  

D．finished

3．From Paragraphs 2 and 3 we can learn that________.

A．it's hard to keep test anxiety at a proper level

B．test anxiety cannot be avoided

C．only lazy students have test anxiety

D．a little test anxiety might be helpful

4．In Paragraph 4,the writer suggests a student who feels too nervous before a test should________.

A．find a quiet place to relax for a while

B．talk to someone to get over the anxiety

C．have a good time with some friends  

D．find out if others feel the same

5．What can we infer from the passage?

A．Test anxiety is a kind of serious illness.

B．Getting prepared can reduce test anxiety.

C．Only teachers can help students get over test anxiety.

D．The more tests a student has,the less anxiety he/she will have.

碘单质难溶于水却易溶于KI溶液。碘水中加入KI溶液发生反应：I₂(aq)+I^－(aq)I₃^－(aq),该反应的平衡常数与温度的关系如右图，下列说法不正确的是

A．上述正反应为放热反应

B．上述体系中加入苯，平衡不移动

C．可运用该反应原理除去硫粉中少量的碘单质

D．实验室配制碘水时，为增大碘单质的溶解度可加入适量KI溶液

牛羊胃肠道线虫病患畜放牧时离群落后，步样强拘，后躯（）。

A.僵硬

B.麻痹

C.萎缩

D.瘫痪