问题 单项选择题

某用户要建一个长方形的羊栏,则羊栏的面积大于500m2

(1)羊栏的周长为120m;

(2)羊栏对角线的长不超过50m.

则()

A.条件(1)充分,但条件(2)不充分;

B.条件(2)充分,但条件(1)不充分;

C.条件(1)和(2)单独不充分,但条件(1)和条件(2)联合起来充分;

D.条件(1)充分,条件(2)也充分;

E.条件(1)和条件(2)单独不充分,但条件(1)和条件(2)联合起来也不充分.

答案

参考答案:C

解析:

显然要联合分析,可设矩形的长与宽分别为a和6,由条件(1)和条件(2)可得

[评注] 显然单独不充分,需要两条件联合,考试时候可以直接选C.

完形填空

阅读下面短文,并根据短文后的要求答题(请注意问题后的字数要求)。

[1]Perhaps you are an average student with average intelligence. However, you can receive better grades if you want. Yes, even students with average intelligence can be top students without additional work. Here's how:

[2]Plan your time carefully. Make a list of your weekly tasks. Then make a schedule of your time. Be sure to set aside enough time to complete your normal reading and work assignments. Of course, studying shouldn't occupy all of the free time on the schedule.

[3]Make good use of your time in class. Listening to what the teacher says in class means less work later. Take notes to help you remember what the teacher says.

[4]Skim before you read. Look over a passage quickly before you begin to read it more carefully. As you preview the material, you get some idea of the content and how it is organized. Later when you begin to read, you will recognize less important material and you may skip some of these portions. Skimming helps double your reading speed and improve your comprehension as well.

[5]         .Go over your notes as soon as you can after class. Review important points mentioned in class as well as points you remain confused. If you know what the teacher will discuss the next day, skim and read that material, too. If you review your notes and textbook regularly, the material will become more meaningful and you will remember it longer. Regular review leads to improved performance on tests.

[6]Develop a good attitude towards tests.The purpose of a test is to show what you have learned about a subject. The world won't end if you don't pass a test, so don't worry excessively (过分地) about a single test.

[7]There are other techniques that might help you with your studying. Improving your studying habits will improve your grades.

小题1:What’s the best title of the passage? (no more than 8 words)

                                                                            

小题2:Please translate the underlined sentence in paragraph one into Chinese.

                                                                            .

小题3:Please fill in the blank in the fifth paragraph with proper words. (no more than 4 words)

                                                                             

小题4:According to the passage, how can an average student improve his/her grades?(no more than 6 words)

                                                                             

小题5:What does the word “it” (line 4, paragraph 5) probably refer to? (no more than 3 words)

                                                                             

名词解释