【简答题】He has studied the cultures of ________ (不同的)Western countries.
【单选题】Which of the following determiners can be placed before both singular count nouns and plural count nouns?
【简答题】2017-07-21-1005-40.flv
【单选题】关于电阻定律,以下说法正确的是:
A.
对于一定材料制成的均匀导体,在一定温度下,它的电阻跟长度成反比
B.
对于一定材料制成的均匀导体,在一定温度下,它的电阻跟横截面积成正比