C is an object－oriented programming language.（)

A.5˚C~63˚C

B.0˚C~-5˚C

C.1˚C~5˚C

若|A|=|B|,|C|=|D|，则|A∪C|=|C∪D|。()

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& C::operator +=(const C& c);

B.C C::operator +=(const C& c);

C.C& C::operator +=(C c);

D.C C::operator +=(const C c);

A.('A'＜=c)AND('Z'＞=c)

B.(c＞='A')&&(c＜='Z')

C.(c＞='A')&(c＜='Z')

D.A'＜=c＜='Z'

A.c=999

B.c='c'

C.c="c"

D.c="haha"

A.'a'＜＝c＜＝'z'

B.(c＞＝A) &&(c＜＝z)

C.('a'＞＝c) | | ('z'＜＝c)

D.(c＞＝'a') &&＜c＜＝'z')

A.30°C~32°C

B.33°C~36°C

C.38°C~40°C

D.45°C~50°C

E.50°C~60°C