以下哪项不是抗结核药的应用原则
A．长期大剂量服药B．早期用药C．联合用药D．全疗程规律用药E．适宜的剂量
参考答案：A
下列分解因式正确的是（ ）
A．x3﹣x=x（x2﹣1）
B．m2+m﹣6=（m﹣3）（m+2）
C．1﹣a2+2ab﹣b2=（1﹣a+b）（1+a﹣b）
D．x2+y2=（x+y）（x﹣y）
用括号内所给词的适当形式填空。
1. ______ (I) baseball is here. Do you want to play baseball with me?
2. I have two ______ (dictionary), a Chinese dictionary and an English dictionary.
3. This is the ______ (one) day of the new term (学期).
4. ______ (be) you Mr. Black?
5. I have two ______ (watch). One is pink. The other is black.
