英语science and technology 作主语

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/23 12:13:49

英语science and technology 作主语
China sent up ShenzhouVII manned spaceship into space successfully,which shows science and technology _____ rapidly in China.
A.have been developing B.develops C.is developing D.has developed
我不明白为什么是选这个时态,而不选c,不是可以表示正在发展变化的过程吗?还有一个问题就是science and technology 做主语是应不应该看成是一个整体表示科技呢,谓语用单数还是复数

用完成时表示已经发生,对现在产生影响并可能延续到将来.而一般进行时只表示现在的动作状态.
The writer and singer likes fishing.那个作家兼歌手爱好钓鱼.(用单数,只有一个定冠词,为一个人)
The writer and the singer like fishing.(用复数,有两个定冠词,表示形容的是独立的两个人)
这里的science and technology均不加冠词,视为两项独立存在的事物

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