【单选题】—— Excuse me, is this Mr. Brown’s office? —— I’m sorry, but Mr. Brown___works here.He left about three weeks ago.
B.
no more C not still D. no longer
【简答题】常见的间歇运动机构有____________、槽轮机构、不完全齿轮机构和__________式间歇运动机构。
【单选题】—— Excuse me, is this Mr. Brown’s office? —— I’m sorry, but Mr. Brown___works here.He left about three weeks ago.
【单选题】听力原文:W: You are late for work today, Mr. Brown. It's unusual. M: I'm sorry. There was something wrong with my bike. What is true about Mr. Brown?
A.
He looks unusual today.
B.
He is usually late for work.
C.
There is always something wrong with his bike.
【简答题】常见的间歇运动机构有[填空(1)]机构、[填空(2)]机构和[填空(3)]机构。
【简答题】什么是同离子效应?什么是盐效应?缓冲溶液的作用机理与哪种效应有关?酸碱指示剂的作用机理是什么?
【简答题】常见的间歇运动机构有[填空(1)]、[填空(2)]和[填空(3)]等。
【简答题】常见的间歇运动机构有( )、( )、凸轮式间歇机构和不完全齿机构等几种。