一、硼成键特征： 1. B主要以共价键成键： B 原子半径小，I1、I2、I3 大

7—1、根据图 7-1-7 画出 i1、i2、i3分别达到最大值时刻的旋转磁场。 提示：根据图 7-1-7 画出。7—2、有一台四极三相异步电动 机，电源频率为 50Hz，带负载运行时的转差率为 0.03,求同步转速和 实际转速

1. 以下程序输出结果是 int i,j; main() { j=1; j=func( )；printf(“%d,”,j); j= func( )；printf(“%d”,j); } int func( ) { int k=0; k=k+i; i=j+10; return k; }

Uinta I. Basic listening practice 1. Script M: Do you see yourself as a leader or more of a team player? W: Well, it depends on the circumstances. I usually enjoy working as part of a team and helping everyone work together. But if the leadership is weak, I'm not afraid to take over in order to achieve the goal at hand Q: What does the woman want to be?

II. Listening Skills Listening for names 1. Doris: Good morning. Can I help you? David: Yes. I need to change one of my courses Doris: I'll see what we can do. What's your name, please? David: My names David Brown Doris: Your first name again? David: David. D-A-V-L-D

对于任何程序设计语言而言，输入输出（I/O）系 统是最复杂的一部分，因为通信的双方不仅仅是 I/O源端和接收端，还可能是文件、网络链接或内 存磁盘等，而且这些数据的数据格式多样，如字 符、二进制、字节。Java通过创建大量的类库解 决这个问题

Ever since last Novem ber, I have been wanting to ex press in person my gratit ude to the generas ity of Alfred Nobel, to w hom i ow e it t hat I am privileged be here today, es pecial y since ill ness prevented me from doi ng so at the proper time. the idealism w hic h permeated his char acter led him to make his magnifice nt foundation for the benefit of a cl ass of men with w hose aims and view poi nt his ow n scienti fic instincts and a bility had made him naturally his

1、（1）double（2）f1（3）f2 2、（1）struct student（2）n-1（3）a[i].name,a[j].name 3、（1）0（2）x[i]/N（3）j++ 4、（1）k（2）N（3）a[k][i]

C语言语句可以分为五大类: (1)表达式语句 表达式语句由一个表达式加一个分号构成,其一般形式为: 表达式; 在C语言中用的最多的是由赋值表达式加一个分号构成的赋值表达式语句 例如:i=i+1;a=3.5;i++

Nobel Lecture, June 2, 1920 The genesis and present state of development of the quantum theory If i take it correctly that the duty imposed upon me today is to give a public lecture on my writings, then i believe that this task, the importance of which i am well aware through the gratitude felt towards the noble-minded founder of our Foundation, cannot be more suitably fulfilled than by my trying to give you the story of the origin of the quantum theory in broad outlines and to couple with this, a picture in a small frame of the development of this theory up