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题目
The astronaut did many experiments in the spaceship,---much help for knowing space.
空中写which we think are of,觉得WHICH后面的成分有些复杂,就是说OF在这里有什么意思?是遵循了什么语法?

提问时间:2021-04-01

答案
we think是插入语 不管
of +名词=形容词
of help=helpful
which are of much help for knowing space.
=which are very helpful for knowing space.
明白了吗
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