5.在一密闭容器中,储有A、B、C三种理 想气体,处于平衡状态.A种气体的分子数 密度为n1,它产生的压强为p1,B种气体 的分子数密度为2n1,C种气体的分子数密 度为3n1,则混合气体的压强p为 (A)3p1(B)4p1 (C)5 pl D) pl

1.在标准状态下,任何理想气体在1m3中 含有的分子数都等于 (A)6.02×1023 (B)8.02×1021 (C)2.69×1025 (D)2.69×1023

1、地址与指针 2、指针与数组 3、指针与字符串 4、指针与函数 5、指针数组和指向指针的指针

1、选择结构 2、选择结构 3、程序举例

编译预处理内容介绍 1、预处理概述 2、宏定义 3、文件包含 4、条件编译

The lowpass filter H(u) has a cutoff frequency wc=205T rad/ sec. Thus, c(t)is r(t) where all terms with frequency above we are removed by the lowpass filter. The terms which are kept have kwol 205T rad /sec k|< 10.25, so the output, ac(t),is r(t)= To obtain n, we sample c(t) every T=5 10-3 seconds with an impulse train The sampling frequency is 400T=2 x maximum frequency in c(t). Therefore

Unit 1 Reading o Directions: There are 3 passages in this unit. Each passage is followed by some questions or unfinished statements For each of them there are four choices marked A), B), C)and

1、预处理命令 （1)宏定义 （2)文件包含 （3)条件编译 2、指针和指针变量的概念 3、指针变量的使用

Section A Longing for a New Welfare System Section B A Blind Man Helped Me See The Beautiful World Section C A hard Job to Come By

Section A The Bermuda Triangle phenomenon Section B The Ride of My Life Section C Easy Ride in a Taxi