进口信用证业务流程长，所需材料多，窗口单位对文件要做好哪些管理工作（）A.预留银行与

评定测量精度的标准，通常用（）来表示。

A.中误差

B.极限误差

C.相对中误差

D.平均误差

Most students develop a fear of tests. It is mainly because they lack self-confidence. Fortunately, overcoming your fear of tests is not difficult, as long as you follow the tips below:

  1  Those who think that they are not well-prepared are usually those who fear tests the most. As long as you know that you have studied well and for long enough, you will be successful.

  2   As long as you have studied well, you will be more confident of your ability to succeed in the test.

  3  This way, you know what to prepare for and you can gain confidence about how well you will do in the test.

You should know that tests only measure your ability, not your intelligence. So, even if you think you will do badly in one test, be sure that there are other tests to come in which you can do better.   4  

  5  However, with the right attitude and preparation, you can overcome your fear of tests through the use of these tips.

A．Ask your teacher beforehand about the material that is going to be covered in the test.

B．Be confident of yourself.

C．Only if you overcome your fear can you achieve much in the tests.

D．Make sure that you are well-prepared.E. Never be afraid of the coming test.

F. As long as you think that there is another tomorrow, you can overcome your fear of this one test.

G. A fear can be a hurdle (障碍) to success.

下面有关信息传递的说法错误的是（）

A.任何生态系统都有信息传递

B.信息传递使生态系统的所有成分形成一个统一整体

C.生态系统的物质循环过程与信息传递没有关系

D.生态系统中的信息传递的范围可以是同种生物之间，也可以是不同种生物之间，还可以是生物与环境之间

热处理钢筋强度提高较多，综合性能理想，特别适用于（）。

A.钢筋混凝土构件的配筋

B.钢结构

C.预应力混凝土构件的配筋

D.高层结构的配筋

政治经济学