一项工程计划投资56万元，实际投资49万元，节约了百分之几？
（56-49）÷56，
=7÷56，
=0.125，
=12.5%；
答：节约了12.5．
可用于尿崩症的降血糖药是
A．格列本脲
B．甲苯磺丁脲
C．格列齐特
D．氯磺丙脲
E．格列吡嗪
用be动词的适当形式填空
1. They ______ my mom and dad(爸爸).
2. This ______ my teacher.
3. -Hello! ______ you Ann?
-No, I ______ not. I ______ Rose.
4. Tom and Jack ______ 12 years.(12岁)
5. She ______ a good girl.(好女孩)
6. -Who ______ he?
-He ______ Zhai Zhigang.
7. -How ______ you?
-I ______ fine.
8. He______ from Yanhe.
9. -______ he Jim?
-Yes, he ______.
10. We ______ from Japan.
