经度的取值范围为（）。
A.0°～90°
B.0°～180°
C.0°～360°
D.-90°～-90°
参考答案：B
The young lady was careful _________.
A．not repeating her mistake
B．not repeated her mistake
C．to not repeat her mistake
D．never to repeat her mistake
传说中我国最早的古籍有（）
A.三坟
B.五典
C.八索
D.九丘
E.史记
