下列选项中,可以用于判断c中保存的字符是否是英文字母的表达式是()。
A.c>='a' and c<='Z'
B.c>='A' and c<='z'
C.c>='a' and c<='z' and c>='A' and c<='Z'
D.c>='a' and c<='z' or c>='A' and c<='Z'
A.c>='a' and c<='Z'
B.c>='A' and c<='z'
C.c>='a' and c<='z' and c>='A' and c<='Z'
D.c>='a' and c<='z' or c>='A' and c<='Z'
第1题
A.c>='a' and c<='Z'
B.c>='A' and c<='z'
C.c>='a' and c<='z' and c>='A' and c<='Z'
D.c>='a' and c<='z' or c>='A' and c<='Z'
第2题
A.c>='a' and c<='Z'
B.c>='A' and c<='z'
C.c>='a' and c<='z' and c>='A' and c<='Z'
D.c>='a' and c<='z' or c>='A' and c<='Z'
第3题
A.(ch >= 'a' && ch <= 'z' ) || (ch >= 'A' && ch <= 'Z' )
B.('a' <= ch <= 'z' ) || ('A' <= ch <= 'Z' )
C.('a' <= ch <= 'z' ) && ('A' <= ch <= 'Z' )
D.(ch >= 'a' && ch <= 'z' ) && (ch >= 'A' && ch <= 'Z' )
第4题
A.(ch >= 'a' && ch <= 'z' ) || (ch >= 'A' && ch <= 'Z' )
B.('a' <= ch <= 'z' ) || ('A' <= ch <= 'Z' )
C.('a' <= ch <= 'z' ) && ('A' <= ch <= 'Z' )
D.(ch >= 'a' && ch <= 'z' ) && (ch >= 'A' && ch <= 'Z' )
第6题
A.ch>='A' & ch<='Z'
B.ch<='A' ||ch>='Z'
C.'A'<=ch<='Z'
D.ch>='A' && ch<='Z'
第7题
A.ch>='A' && ch<='Z'
B.'A'<=ch<='Z'
C.ch<='A' ||ch>='Z'
D.ch>='A' & ch<='Z'
第8题
A.ch>='A' & ch<='Z'
B.ch<='A' ||ch>='Z'
C.'A'<=ch<='Z'
D.ch>='A' && ch<='Z
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