罗斯福新政的根本目的是[ ]
A．消除经济危机
B．改善人民的生活状况
C．巩固资本主义统治
D．为美国夺取世界霸权
答案：C
关于“催化剂”在化学反应前后的说法有：①质量减少；②质量不变；③化学性质改变；④化学性质不变；⑤二氧化锰可作各种化学反应的催化剂。在上述说法中正确的是
A．①和③
B．②和④
C．②和③
D．②③和⑤
It was _________that Miss Wang had been to California and there she met Dr. White __________, who became her husband later.
A．the first time, the first time
B．the first time, for the first time
C．for the first time, for the first time
D．for the first time, the first time
