17. Professor Smith and Professor Brown will ____ in giving the class lectures.
A. alter B. change
C. alternate D. differ
alter 改变
change 改变
from...to... 差异
convert 转变
converter 叛教者
differ 不同 di(两个)fer(分开)
differ from 不同
fetch 取来
ferryboat 渡船
conifer 针叶树 coni(松果)fer(带来)
cone 圆锥形,松果
conference 会议 con(共同)fer(带来)
meeting 会议
convention 国际大会,风俗习惯 con(共同)vent(来)、谐音:肯纹身
adventure 冒险 vent(出去)
summit 高峰,顶点,峰会 sum(组合)mit(改变)
forum 论坛 来源于古代罗马
seminar 学术研讨会 六足论坛 席明那尔
alternate adj.轮流的,v.轮流
A.C.:A.lternating C.urrent 交流电
alternative adj.二者择一的,n. 二中择一,其他的
at an alternative 作为另一个选择
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