已知函数y=ax2-ax+3x+1与x轴有且只有一个交点,那么交点坐标为( )。
(-1,0)或(0)或(一,0)
下列有关弓形虫病的描述,不正确的是()
A.弓形虫病是由刚地弓形虫引起的人畜共患病
B.弓形虫是专性细胞内寄生的原虫
C.弓形早滋养体在细胞外形成的集落称为假囊
D.弓形虫组织包囊可以存在于体内任何器官,但多见于脑、心和骨骼肌
E.弓形虫可以通过先天和获得性两种途径传播给人
The nurse is caring for a client who complains of lower back pain. Which instructions should the nurse give to this client to prevent back injury
A.Bend over the object you're lifting.
B.Narrow the stance when lifting.
C.Push or puI1 an object using your arms.
D.Stand close to the object you're lifting.