系统论的最基本原则是( )。
A.最优化
B.差异性
C.整体性
D.合理化
参考答案:C
When she was in trouble, I did what I could to help her. my help, she wrote me a letter of thanks.
A.In honor of
B.In case of
C.In terms of
D.In return for
涨发海参时切忌接触()。
A、盐;
B、糖;
C、酒;
D、水