19世纪末,信用制度的发展和市场竞争的激烈这两个因素强烈刺激了欧美各国在公司规模和数量上的急剧发展。
参考答案:错
It _____ ten years since they _____ to France.
A.was; moved
B.was; have moved
C.is; have moved
D.is; moved
配制定影液时,为何必须按配方规定的先后次序一一溶解?