中式餐桌一般高（）。A．0.68m-0.75m B．0.7m-0.9m C．0.75

Performing better under pressure

What is the most stressful thing in school? It is probably exams．小题1:．       But some students succeed under pressure，while others struggle．So，why do some students perform better under stress?

It all comes down to dopamine （多巴胺）． Dopamine is a chemical in our body that sends signals （信号） in the brain．It has many important roles：affecting memory，attention and how we learn．小题2:．       

Our brains control dopamine in two ways．It either takes out dopamine quickly，or gradually．Exam success can be linked to how fast dopamine goes back to a balance，according to new research from the University of Missouri，reported Yahoo．

小题3:．       If you become stressed，your brain will start to overload （起负荷） on dopamine．It is like a cup overflowing with water．The quicker you are able to go back to a balance of dopamine，the quicker you can concentrate．小题4:．      

Researchers found that，during a test，people who slowly got back to a balance of dopamine scored 8 percent lower． That’s me difference between a good mark and a bad mark．

But don't fear，there is good news for every student．小题5:．    So，it turns out that practice really makes perfect．

根据短文内容，从下面五个选项中选出能填入文中空缺处的最佳选项，使短文意思通顺、内容完整，并在答题卡上将该项涂黑。

A．This will help you perform better on a test．

B．Exams can put us under a lot of pressure．

C．The study also found that the more practice you get，the less stressed you’ll be．

D．What happens when we take an exam?E．Our brains work best when there is a balance of dopamine—not too much or too little．

张警官一年内参与破获的各类案件有100多件，是王警官的5倍，李警官的五分之三，赵警官的八分之七，问李警官一年内参与破获了多少案件？（）

A．175

B．105

C．120

D．不好估算

句型转换

1. We need two slices of turkey. (对划线部分提问)

    _______ _______ we _______?

2. Put the relish on the chicken slice.(改为否定句)

    _______ _______ the relish on the chicken slice.

3. Let's make dumplings.(改为同义句)

    _______ _______ making dumplings?

紧急限压阀故障原因分析与故障判断

变配电所中，母线一般多用（）进行分段。

A.隔离开关；

B.负荷开关；

C.断路器；

D.铁壳开关。