— Mabel, did you catch a cold again?
—Yes. I didn't realize the importance of doing enough exercise.
A:was afraid of
B:was unaware of
C:was worried about
普通来说,一个复杂的流程图都可以分解成____、____、____三种结构;
马丁·路德说:“神的话,全部神的话,只有神的话,乃是一切的准则……教皇和一切的教法会议,都可能错误,”这种思想的社会意义是
(1)x2﹣3x=10 (2)3x2﹣2x﹣4=0.