已知变量x与y之间存在着负相关,指出下列回归方程中哪一个肯定是错误的()
A、=–10-0.8x
B、=100-1.5x
C、=–150+0.9x
D、=25-0.7x
参考答案:C
1. 根据所读内容将Helen, Jane, Gina 三个名字分别填入相应的横线上
①___________ ②_____________③_____________
2. The three girls wrote to ask for ________________________.
3. The underlined words “turned her back on me” means “________________________” in Chinese
4. It is clear that Helen is not ________________________ with her parents.
5. According to the advice, Jane should ________________________ her friend as usual.
l、合理使用非处方药时要注意
A.妥善保管好药品
B.防止滥用
C.严格按说明书用药
D.正确自我判断、正确选用药品
E.不要买“三无”产品,不要买包装破损或封口已被开过的药品