下列哪种襟翼产生增升效果好：（）A、后退式襟翼 B、前缘襟翼 C、富勒襟翼 D、开缝式襟翼

阅读理解。

 Dear Sandy,

     How are you? It's Saturday today and I have some time to write to you. We're busy from Monday to

 Friday. We have to get up at six thirty in the morning. After some exercise we have breakfast. We have

 five classes a day and the first class begins at eight. Our teachers are strict and we can't be late for school.

  They often ask us a lot of questions and some of them are difficult.

     We do sports at five in the afternoon. We play basketball, soccer, volleyball, tennis or ping-pong.

 Some of my classmates like Art. They can sing or dance or draw. Sometimes Miss White, our Biology

 teacher, takes us to the zoo and we visit the animals there. At six we can leave our school.

     After supper we can watch TV. But we have to finish our homework first. I like Math and often do

 some difficult exercises. So I go to bed at ten thirty. I'm often tired but I like it.

     Please write to me and tell me about yourself.

                                                                                                                                    Yours,  

                                                                                                                                 Zhang Hong

1. Zhang Hong is very busy _____.

    A. from Monday to Friday                  

    B. on Saturday

    C. on Sunday                            

    D. on Wednesday

2. Zhang Hong can sleep for _____ hours a day

    A. six                    

    B. seven                

    C. eight                

    D. nine

3. Miss White teaches _____ in Zhang Hong's school.

    A. Biology        

    B. Math            

    C. Art              

    D. Music

4. The children have sports _____ .

    A. in the afternoon                          

    B. after school      

    C. in class                                      

    D. in the morning

5. Zhang Hong does some difficult Math exercises because _____ .

    A. her teacher makes her do so      

    B. she has much time at home

    C. she likes it                    

    D. her teachers are strict

市场分析与预测专责负责本地区月度、季度、年度的用电搜集整理工作。

利用乘法结合律可以使25×8+75×8计算简便．______．（判断正误）

解放思想往往是改革的先导。我国改革开放的历史进程中，20世纪70年代末和90年代初两次思想解放的相同点有

①顺应了世界经济全球化趋势         ②以反对个人崇拜为重点内容

③坚持了实事求是的思想路线         ④有利于破除计划经济的束缚

A．①②

B．③④

C．①③④

D．②③④