A:开关处于断开状态,电容C2的电量大于C1的电量
B:开关处于断开状态,电容C1的电量大于C2的电量
C:开关处于接通状态,电容C2的电量大于C1的电量
D:开关处于接通状态,电容C1的电量大于C2的电量
已知集合A={0,1,2},B={x|y=lnx},则A∩B=( )
阅读理解。
Amy and Sarah are good friends. They are from America. They like winter in America because there are many activities in winter. They can make a snowman,go fishing and go skiing with many friends. There are two festivals (节目) in winter. They're Christmas Day and Thanksgiving. Amy and Sarah are very happy. But they're in Beijing now. They like winter in Beijing, too. Because It's beautiful. It's windy and cold. They're going to visit the Great Wall, so they're very happy.