—What colour __________your shoes?— __________ black.
A:is; It's
B:is; Its
C:are; Their
D:are; They're
《隋书·食货志》云:“晋自中原丧乱,元帝寓居江左,百姓之自拔南奔者,并谓之侨人。皆取旧壤之名,侨州郡县。”如在京口(今江苏镇江)侨立南徐州。侨州郡县设立的主要影响是( )
如图所示,a、b端输入恒定的交流电压。理想变压器原、副线圈分别接有额定电压均为12V,额定功率均为2W的灯泡A,B,C。闭合开关,灯泡均正常发光。则下列说法正确的是( )
把Rt△ABC沿斜边上的高CD折起使平面ADC⊥平面BDC,如图所示,互相垂直的平面有____ 对.
—I don't like the style. Could I look at that_______?