人是吸进氧气呼出二氧化碳?问氧气从哪来?碳分子又从何而来?
来源:学生作业帮助网 编辑:作业帮 时间:2024/10/06 19:46:50
xVRGxg\IaXOHىJle=GAH%$BD/b_=+~!%"b$bGj4=}|h,!%mnև+%_tm8`">AY_{Nˍ? Z+kHM*7+C5oًnm)"CwFeL)%|)V -QGmwo[&n]iR<ʏw|B~X8-%0[8
E&Cg>HmHXumqS~^hʋ#qE* NqG8gmgEM"Խ@[c'oY7ٯD<0혶zG2FVrZ,SnRv?uXX 05a3阖
!) ,ĉcS){xP1| Nq,o8";/S6А]~JGn1&.>Lbv.5 2cf$-D[h$#5zE9$+ ,=
;T
rK7]wx?aA:d؝B"S$C|iNmR=
4?ш/WVB_ϟo}W/~3+'}
JWBO_737'7RzGL22jPFlz5Ύ'UBѮYuY/-^:vWW#C[yF&P"utC%yIɈS#+Isj[S2dYCMf%=:r{U Og 5@b֍vT! RCsD,+XdϬ5g80\f~
YR
Wu,o>RұHY[u