四大洲中,跨经度最多的大洲是( )
A.甲
B.乙
C.丙
D.丁
世界上跨经度最多的大洲是南极洲,它位于地球的最南端,大部分处于南极圈内.图中丙是南极洲.根据题意.
故选:C.
— Hello, may I have an appointment with the doctor?
— _____
A.Sorry, he is busy at the moment.
B.Why didn’t you call earlier?
C.Certainly, may I have your name?
D.Sorry, he doesn’t want to see you.
下列反应的离子方程式书写中,正确的是( )
A.将氨水逐滴滴加到AlCl3溶液中:Al3++3OH-=Al(OH)3↓
B.铜与稀硝酸反应:Cu+4H+ +NO3-= Cu 2++NO↑+2H2O
C.硫酸与氢氧化钡在溶液中反应: Ba2++OH-+H++SO42-=BaSO4↓+H2O
D.用FeCl3溶液腐蚀铜箔制造的印刷电路板:2Fe3++Cu=2Fe2++Cu2+