在密度单位中,lg/cm3=_________kg/m3.测得一只苹果的质量为171g、体积为180cm3,则苹果的密度为_________kg/m3.
103;0.95×103.
— Hi, Torry, can I use your computer for a while this afternoon?
— Sorry. ______. [ ]
A. It's repaired
B. It has been repaired
C. It's being repaired
D. It had been repaired
被子植物5个最大的科号称“五大家族”,()居“五大家族”之冠。
A.豆科(或豆目中的蝶形花科)
B.兰科
C.禾本科
D.菊科
E.蔷薇科