绿信比是指()和()的比值。
参考答案:交叉口有效通行时间(绿灯信号时间);周期长度
Tom insisted what he said ______ true, but we insisted that he _____ and have a look.
A.be, should go
B.should be, would go
C.was, go
D.was, would go
《中国学术期刊全文数据库》给出的检索结果,为()。
A.仅题录
B.仅文摘
C.仅全文
D.题录、文摘和全文三种