【单选题】水压机大、小活塞直径之比是10:1,如果大活塞上升20mm,则小活塞被压下的距离是( )mm
【单选题】听力原文:W: Did you listen to the president's speech on the radio last night? M: I was writing a report on economics, a report you know. Q: What can we learn from the man's reply? (17)
A.
The president spoke on the radio on economics.
B.
The president should have reported on economies.
C.
The man missed the speech.
D.
The man thought it was a wonderful report.
【单选题】水压机的大、小活塞的直径之比为 10 : 1 ,如果大活塞要上升 2mm ,则小活塞被压下的距离是 ( )mm 。 ( )
【单选题】编译Java源程序文件后将产生相应的可执行字节码文件,这些文件的扩展名为
【单选题】听力原文:W: Did you listen to the president's speech on the radio last night? M: I was writing a report on economics, a report you know. Q: What can we learn from the man's reply? (17)
A.
The president spoke on the radio on economics.
B.
The president should have reported on economics.
C.
The man missed the speech.
D.
The man thought it was a wonderful report.
【单选题】—Did you listen to Mr.Jackson’s lecture ? — Yes,I have never heard a _____ one.
【多选题】智能物流系统(ILS)与传统物流显著的不同是它能够提供传统物流所不能提供的增值服务,下面哪个属于智能物流的增值服务( )。
【单选题】水压机大、小活塞直径之比是10:1如果大活塞上升2mm,则小活塞被压下的距离是( )mm。