中医治疗中最基本的原则是 （）
A.治病求本
B.扶正祛邪
C.标本先后
D.调整阴阳
E.调和气血
参考答案：A
— What did the professor tell you to do?
— I had to write a _______ report.
[ ]
A. three-thousand words
B. three thousands word
C. three-thousand-word
D. three-thousand-words
影响电磁铁磁性强弱的因素有______、______和______．实验表明______、______、______．电磁铁的磁性越强．
