A、B、C、D、E、F六种元素在周期表中的位置如图所示，下列说法正确的是（ ）族 周期IA 0 1AⅡAⅢAⅣAⅤAⅥAⅦA 2 D 3B ECF A．热
一件商品原来用人民币表示的价格为10元。现在人民币升值25%，在其它条件不变的情况下，同一件商品的价格应是 A．7.5元 B．8元
Everywhere I look outside my home I see people busy on their hightech devices, while driving, walking, shopping, even sitting in toilets. When connected electronically, they are away from physica
秦朝建立的新政治制度的本质特征是 A．改国王为皇帝，权力至高无上 B．中央实行三公九卿制 C．地方实行郡县制，防止割据 D．采用法
Increasingly, Americans are becoming their own doctors, by going online to diagnose their symptoms, order home health tests or medical devices, or even self-treat their illnesses with drugs from Inter
下列反应中，属于非氧化还原反应的是( ) A.3CuS+8HNO33Cu(NO3)2+2NO↑+2S↓+4H2OB.3Cl2+6KOH5KCl+KClO3+3H2OC.3H2O2+2KCrO2+2KOH2K2CrO4+4H2OD.3CCl4+K2Cr2O72CrO2Cl2+3COCl2+2KCl
图为某产业转移过程示意图，据此完成下列各题。 该产业最有可能是 A．汽车制造业 B．服装设计业 C．高新技术产业 D．电子装配业 影响
AB×CD=