I can hardly imagine Peter ____ across the Atlantic Ocean in five days. A. sail B. to sail C. sailing D. to have sailed
We have four classes______________. A.on Monday B.from Monday C.to Monday
It ___ to me that she didn’t know I had moved into the new house. A. appeared B. occurred C. happened D. broke
2009年京沪高铁投资600亿元,这将带动200万吨钢材和1200万吨水泥的需求,提供近60万个就业岗位,同时还可以带动沿线地方的建材、农副产品和日用品的
幂函数y=xm与y=xn在第一象限内的图像如图所示,则( ) A.-1<n<0<m<1 B.n<-1,0<m<1 C.-1<n<0,m>
图所示的电路中,开关S闭合后,三盏电灯并联的电路是:
常温下,CaSO4??在水中的沉淀溶解平衡曲线如图所示,已知K甲(CaSO4)=9×10-6。下列说法正确的是 A.a点对应的KSP小于c点对应的KSP B