A.23°
B.157°
C.337°
D.-23°
[单选题]A.20AB.15AC.10AD.-10A
[单选题]A.1AB.2AC.3AD.9A
[单选题]A.20AB.15AC.10AD.-10A
[单选题]A.1AB.2AC.3AD.9A
[单选题]A.1AB.2AC.3AD.9A
[单选题]A.23°B.157°C.337°D.-23°
[单选题]A.1AB.2AC.3AD.9A
[单选题]A.20AB.15AC.10AD.-10A
[单选题]( ).(c1,c2为任意常数)A.是所给方程的通解B.不是方程的解C.是所给方程的特解D.可能是方程的通解,但一定不是其特解