A.
B.
C.
D.
答案:A
interested her most was the longitude line, is an imaginary line dividing the world.
A, That, it B, What, it C, That, which D, What, which
史密斯GP-UF/A型转换器可现场编程设置输入频率()
A、100~9999kHz
B、1~1000kHz
C、0.01~99kHz
D、0.01~999kHz