A:发动九一八事变
B:制造南京大屠杀
C:发动卢沟桥事变
D:制造柳条湖事件
夏季荷花盛开,为了便于游客领略“人从桥上过,如在河中行”的美好意境,某景点拟在如图所示的长方形荷塘上架设小桥.若荷塘周长为250m,且桥宽忽略不计,则小桥总长为____ m.
— Listen! Someone is knocking at the door. Who can it be?
— It _______ be Tom. He said he would visit me this evening.