it was about 600 years ago___the first clock with a face and an hour was made Awhen B that,
题目
it was about 600 years ago___the first clock with a face and an hour was made Awhen B that,
前面先行词不是时间吗,我觉得应该用when,但答案是that,这取决与什么啊,后面的动词吗,常常分不清,具体说一下好吗,还有前面是地点,什么时侯用where和that,举例说明
答案
这个是强调句型,是it be ...that的固定结构.
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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