【单选题】T h ere are two hundred______i n our school .
【简答题】____________ is any person who notices and give some meaning to a message. H ere are the students.
【简答题】识读图1(a)、(b)图,并回答一下问题:(1)图中FL-1的含义;图中h代表哪里的标高
【单选题】已知一对正确安装的标准渐开线圆柱齿轮传动,其压力角ɑ=,模数m=4mm,传动比i12=3,中心距a=144mm。则两齿轮的分度圆直径分别为
【单选题】辨音题 (T为划线部分发音相同,F为划线部分发音不同) h ear (划线部分:ear) wh ere (划线部分ere)
【单选题】T h ere is no doubt the company has made the right decision on the sales project.
【单选题】Han Han is one of writers, though some old writers don’t like him very much.
【单选题】已知一对正确安装的标准渐开线圆柱齿轮传动,其压力角 ɑ=20度 ,模数 m=4mm ,传动比 i12=3 ,中心距 a=144mm 。则两齿轮的分度圆直径分别为( )