计算机能直接识别的指令代码称为
A．标准语言
B．工具语言
C．高级语言
D．机器语言
E．任何语言
参考答案：A
Annie Jump Cannon, ________ discovered so many stars that she was called "the census taker of the sky".
A．a leading astronomer,
B．who, as a leading astronomer,
C．was a leading astronomer,
D．a leading astronomer who
在中俄贸易中，我国始终处于顺差地位。 ( )
