下列不是雄黄的功效是()
A.解毒
B.燥湿祛痰
C.截疟
D.壮阳通便
E.杀虫
参考答案:D
What colour is your hair?[ ]
A. Her hair is blond.
B. My hair is black.
自然界中只有______种电荷,人们把被毛皮摩擦过的橡胶棒所带的电荷叫______电荷.电荷间的相互作用规律是:同种电荷互相排斥,异种电荷互相______.