目前,世界对汽车排放法规已形成两大体系,即()体系。
A.美国
B.欧洲
C.亚洲
D.日本
参考答案:A, B
____ what he said, he has been to Australia.
A.Judge by
B.Judged by
C.Judging from
D.To judge from
简要说明现金流量图的绘制步骤