电荷之间存在着作用力,同性相互排斥,异性相互吸引。
参考答案:对
---Is Nancy doing her homework?
-----___________.
A.No, she is
B.No, she isn’t
C.Yes, she does
D.Yes, she isn’t
病毒性心肌炎患儿,女。素易感冒,现低热不退,心悸胸闷,神疲乏力,动则汗出,面色不华,食欲不振,舌淡红,苔薄白,脉细软。治以()
A.扶正祛邪
B.温振心阳
C.补益心气
D.益气养阴
E.养阴清热