在如图3-1所示双代号网络图中,不存在()错误。
A.节点编号重复
B.虚工作多余
C.循环回路
D.箭尾节点号大于箭头节点号
参考答案:B
从春秋战国时期到汉代,中国思想界逐渐由“百家争鸣”到“独尊儒术”,其所反映的根本性问题是 [ ]
A.中国思想文化出现倒退
B.中国由分裂到统一
C.商 品经济发展受到限制
D.专制主义中央集权制度加强
Jackie Robinson, the first Black American who was to play baseball in the major leagues, joined the Brooklyn Dodgers in 1947.
A.the first and a Black American who
B.was the first Black American
C.the first Black American
D.the Black American who first