The new book is about how Shenzhou 6 manned spaceship was sent up into space.是宾语还是表语从句

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The new book is about how Shenzhou 6 manned spaceship was sent up into space.是宾语还是表语从句

表语从句,is是系动词题上说是宾语从句,阿累累,我也晕了sorry,是我错了,how引导的是从句作了about的宾语,是宾语从句意思是,about介词后,引导的宾语从句?嗯,介宾结构