B

    I'm at Billy's birthday party. There are a lot of friends in his house. Some stand beside the table and enjoy the snacks and drinks. There is some food on the table. I like the chocolate and the fruit very much. Billy sits in the sofa and chats with some friends there. He wears a red T-shirt and a pair of blue jeans. He looks so cool today. Wow! The cake is really big. There are some candles on it. Billy's friends begin to sing 'Happy Birthday' to Billy. Billy is very excited. He blows out the candles (吹蜡烛) and cuts the cake. Everyone has fun at the party.

将二氧化碳气体通入紫色石蕊试液中，石蕊试液会变成(   )

英国诗人艾内斯特•琼斯在其作品《未来之歌》中写道：“土地，它为地主霸占，海洋，它在商人手头，矿藏充实了债主的钱柜，还有什么归我所有？……”诗歌中的这种局面是受到什么事件的冲击而造成的（  ）