某国的GNP小于GDP,说明该国居民从国外获得的收入()外国居民从该国获得的收入。
A.大于
B.小于
C.等于
D.以上都有可能
参考答案:B
The Roman alphabet is a Greek invention, ______ is the marathon, a long distance race created in honour of a Greek soldier.
A.which
B.what
C.that
D.as
什么叫催化剂的磨损指数?