【单选题】已有定义:char c;,程序前面已在命令行中包含ctype.h文件,不能用于判断c中的字符是否为大写字母的表达式是( )。 A.A.isupper(c)
D.
c<=('z'-32)&&('a'-32)<=c< /div>
【单选题】已有定义:char c;,程序前面已在命令行中包含ctype.h文件,不能用于判断e中的字符是否为大写字母的表达式是( )。
D.
c <= (z - 32)(a - 32) <=c
【判断题】Portugal was the last county that President Xi Jinping visited.
【单选题】What are the positive changes according to President Xi Jinping?
A.
The number of dead cases has been trending lower in recent days.
B.
The number of suspected cases has been trending lower in recent days.
C.
The number of new-confirmed cases has been trending lower in recent days.
【单选题】The Chinese Vice-President Xi Jinping _____ visit the United States on Feb 13 on a three-country tour. [ ]