用配方法解方程:6x2-x-12=0
解:方程两边都除以6,移项得
配方,得
即或
解得,
用同类词替换划线部分。
1. What’s in the living room?
There is a bed.
2. Can you clean the cup?
3. What subjects do you like?
I like Chinese.
4. I have some hamburgers.
5. What day is today ?
It’s Monday.
6. I enjoy jogging.
7. I want to buy a ruler.
8. What are these?
They are geese .
有关FEV1.0检测意义的描述错误的是()
A.正常FEV1.0/FVC%应大于80%
B.支气管哮喘急性发作时FEV1.0/FVC%减低
C.FEV1.0/FVC%较之MMF能更好地反映小气道功能情况
D.弥漫性肺间质纤维化的患者可正常
E.为测定呼吸道有无阻力的重要指标