炉热的铁水温度高,铁沟的火花()。
A.细密而红
B.跳得矮而暗
C.跳得高而亮
参考答案:C
Two or three years ago this kind of glasses _______ a favorite for some time, but now it _______.
A.were, has gone over
B.was, has gone out
C.was, has gone away
D.were, is going down
分析数据,请指出我国城镇人口哪一年超过乡村人口的一半()
A.二十世纪末
B.二十世纪初
C.二十世纪中期
D.二十一世纪初