下列程序的运行结果为【 】。 include <stdio.h> main() { static char str1[40]; char str2140]; strcpy(str2,'China'); strcat(str1,str2); strcat(str1,' is a great country !'); printf('%s %s ',str2,strl); printf('%d %d/n',strlen(str2),strlen(str1)); }
【单选题】下列叙述:1作正弦函数的图象时,单位圆的半径长与 x 轴的单位长度必须一致;2 y = sin x , x ∈ [ 0 , 2 π ] 的图象关于点 P ( π , 0 ) 对称;3 y = cos x , x ∈ [ 0 , 2 π ] 的图象关于直线 x = π 成轴对称图形;4正、余弦函数 y = sin x 和 y = cos x 的图象不超出直线 y =- 1 与 y = 1 所夹的区域...
【简答题】阅读理解。 Hello, nice to meet you. My name is David and I'm a student at Beijing International School. This is a photo of my family. These are my parents and my little sister is behind me. We're from Amer...
【简答题】用所给单词的适当形式填空。 1. —Where ________ (be) the notebooks? —They are in the backpack. 2. Look! The ________ (key) are under the desk. 3. Jim, please ________ (take) these things to your brother. 4. Can you ...
【简答题】用动词be (am, is, are)填空。 1. She _____ a teacher. Her name _____ Mary. 2. I _____ a boy. My name _____ Li Ming. 3. Who _____ this girl? She _____ Li Mei. 4. How old ______you? I _____ eleven. 5. What _...