A:锌、氮、钾
B:钙、氮、磷
C:硼、磷、钾
D:氮、磷、钾
①阳光
②水分
③适宜的温度
④稳定的营养供给
⑤土壤
⑥岩石
用托盘天平称量一粒黄豆的质量,下列方法中可取的是( )
—The supermarket is crowded(拥挤的). There are ___________ people there.—Yeah, and the things there are always ______________ expensive(贵的).