方程px2-q=0有两个不相等实根的条件是______.
当△>0且p≠0时,方程有两个不相等实根,
即△=0-4•p•(-q)=4pq>0,
∴pq>0.
故答案为pq>0.
肌电图或诱发电位,主要是检查
A.肌损伤B.肌腱损伤C.骨关节损伤D.肿瘤E.周围神经损伤
The dichotomy postulated by many between morality and interests, between idealism and realism, is one of the standard clichēs of the ongoing debate over international affairs.
A.division into two parts
B.combination of two parts
C.disparity
D.contradiction