【单选题】一般来说人体适宜的温度为( )湿度为50%~70%。
【简答题】text A in lesson nine
【单选题】一般来说人体适宜的温度为( ) 湿度为 50% ~ 70% 。
【简答题】text A in lesson fif
【单选题】There are _____ words in the text of the _____ Lesson.
【单选题】Please write down the new words in the text of _______.
【简答题】text A and text B in the lesson twelve
【单选题】利用1-丁醇制备1-溴丁烷时,蒸馏出粗产物分别用水和冷的浓硫酸洗涤,再充分震荡并静置分层后,有机层( )
【简答题】text A and text B in the lesson four