通过抓住关键词了解和掌握知识点是学习历史的方法之一。与“悲剧”、“英雄主义”、“

将直角三角形的三条边长同时扩大同一倍数，得到的三角形是（　　）

A．钝角三角形

B．锐角三角形

C．直角三角形

D．等腰三角形

Taking good notes is a time-saving skill that will help you to become a better student in several ways小题1: Second, your notes are excellent materials to refer to when you are studying for a test. Third, note-taking offers variety to your study time and helps you to hold your interest.

You will want to take notes during classroom discussions and while reading a textbook or doing research for a report.小题2: Whenever or however you take notes, keep in mind that note-taking is a selective process.小题3:

The following methods may work best for you.

●Read the text quickly to find the main facts and ideas in it.

●Carefully read the text and watch for words that can show main points and

supporting facts.

● Write your notes in your own words.

● 小题4:

● Note any questions or ideas you may have about what was said or written.

As you take notes, you may want to use your own shorthand(速记). When you do, be sure that you understand your symbols(符号) and that you use them all the time.小题5:

A．Use words, not complete sentences.

B．There are three practical note-taking methods.

C．You must write your notes on separate paper.

D．Otherwise, you may not be able to read your notes later.E. you will also want to develop your own method for taking notes.

F. That means you must first decide what is important enough to include in your notes.

G. First, the simple act of writing something down makes it easier for you to understand and remember it.

如图所示，用OA、OB两根轻绳将物体悬于两墙之间，OA、OB两根轻绳之间的夹角为90°．当更换OA绳，使A点下移，直至轻绳OA为水平，在此过程中保持O点位置不变．则在A点不断下移到A′的过程中，绳OA的拉力（　　）

A．逐渐增大

B．逐渐减小

C．先变小后变大

D．先变大后变小

根据下面的资料回答问题：

在审计计划阶段，首席审计执行官根据以下因素评估四项审计业务：该业务在降低组织风险上的作用；该业务在为组织节省资金方面的作用；自上次审计业务以来该领域的改变程度。首席审计执行官为每项业务的每一因素从低到高进行记录、打分，并算出总排名。结果如下表(括号内为分数)：

如果所有因素都得到同等程度的衡量，首席审计执行官应优先进行哪些审计业务？（）

A．审计业务1和2。

B．审计业务1和3。

C．审计业务2和4。

D．审计业务3和4。

TDCS的网络体系规模基本上可以分（）个层次。

A.1

B.2

C.3

D.4