【简答题】Passage One In the eyes of many people, city life is attractive with all its advantages and convenience, yet they don’t see (1) . First, with the expansion of the city, housing has become a serious pr...
【单选题】设有以下结构体类型: struct st { char name[8] ; int num ; float s[4] ; } student[50] ; 且结构体数组 student 中的元素都已赋值,若要将这些元素值写到文件 fp 中,以下不正确的形式是 ( )
A.
fwrite( student , sizeof( struct st) , 50 , fp) ;
B.
fwrite( student , 50 * sizeof( struct st) , 1 , fp) ;
C.
fwrite( student , 25 * sizeof( struct st) , 25 , fp) ;
D.
for( i=0 ; i<50 ; i++) fwrite( student , sizeof( struct st) , 1 , fp) ;
【简答题】一个纯电感线圈接在直流电源上,其感抗为 ,电路相当于 。
【单选题】对于一种可变生产要素的生产函数而言,当总产量递减时,边际产量处于( )。
【单选题】You have to hurry up if you want to buy eggsbecause there’s hardly _______left.
【单选题】Luis: My flight leaves at six.
A.
He should go to the airport now.
B.
He shouldn't leave the office.
C.
He can't take the six o'clock flight.
【单选题】对于一种可变生产要素的生产函数而言,当总产量达到最大值而开始递减时,边际产量
【单选题】You have to hurry up if you want to buy something because there’s hardly __ left.